42545554155 has 48 divisors (see below), whose sum is σ = 82359819360. Its totient is φ = 20945495808.

The previous prime is 42545554153. The next prime is 42545554171. The reversal of 42545554155 is 55145554524.

It is a happy number.

42545554155 is a `hidden beast` number, since 4 + 2 + 5 + 4 + 55 + 541 + 55 = 666.

It is not a de Polignac number, because 42545554155 - 2¹ = 42545554153 is a prime.

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 42545554155.

It is not an unprimeable number, because it can be changed into a prime (42545554153) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1331010 + ... + 1362599.

It is an arithmetic number, because the mean of its divisors is an integer number (1715829570).

Almost surely, 2^42545554155 is an apocalyptic number.

42545554155 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42545554155 is a deficient number, since it is larger than the sum of its proper divisors (39814265205).

42545554155 is a wasteful number, since it uses less digits than its factorization.

42545554155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693642 (or 2693630 counting only the distinct ones).

The product of its digits is 2000000, while the sum is 45.

The spelling of 42545554155 in words is "forty-two billion, five hundred forty-five million, five hundred fifty-four thousand, one hundred fifty-five".