155454647040 has 576 divisors, whose sum is σ = 687780817920. Its totient is φ = 32301711360.

The previous prime is 155454646981. The next prime is 155454647063. The reversal of 155454647040 is 40746454551.

155454647040 is a `hidden beast` number, since 1 + 5 + 545 + 4 + 64 + 7 + 0 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a super-2 number, since 2×155454647040² (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 an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2631912 + ... + 2690328.

It is an arithmetic number, because the mean of its divisors is an integer number (1194063920).

Almost surely, 2^155454647040 is an apocalyptic number.

155454647040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155454647040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343890408960).

155454647040 is an abundant number, since it is smaller than the sum of its proper divisors (532326170880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155454647040 is a wasteful number, since it uses less digits than its factorization.

155454647040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58465 (or 58445 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 45.

The spelling of 155454647040 in words is "one hundred fifty-five billion, four hundred fifty-four million, six hundred forty-seven thousand, forty".