155454540345 has 24 divisors (see below), whose sum is σ = 290181809736. Its totient is φ = 76531465728.

The previous prime is 155454540343. The next prime is 155454540349. The reversal of 155454540345 is 543045454551.

155454540345 is a `hidden beast` number, since 1 + 5 + 54 + 54 + 540 + 3 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4139764281 + 151314776064 = 64341^2 + 388992^2 .

It is not a de Polignac number, because 155454540345 - 2¹ = 155454540343 is a prime.

It is a super-2 number, since 2×155454540345² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 155454540345.

It is not an unprimeable number, because it can be changed into a prime (155454540341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132866544 + ... + 132867713.

It is an arithmetic number, because the mean of its divisors is an integer number (12090908739).

Almost surely, 2^155454540345 is an apocalyptic number.

155454540345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155454540345 is a deficient number, since it is larger than the sum of its proper divisors (134727269391).

155454540345 is a wasteful number, since it uses less digits than its factorization.

155454540345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265734281 (or 265734278 counting only the distinct ones).

The product of its (nonzero) digits is 2400000, while the sum is 45.

Adding to 155454540345 its reverse (543045454551), we get a palindrome (698499994896).

The spelling of 155454540345 in words is "one hundred fifty-five billion, four hundred fifty-four million, five hundred forty thousand, three hundred forty-five".