155064978 has 24 divisors (see below), whose sum is σ = 336450816. Its totient is φ = 51615000.

The previous prime is 155064977. The next prime is 155065013. The reversal of 155064978 is 879460551.

155064978 is a `hidden beast` number, since 1 + 550 + 6 + 4 + 97 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (155064977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7783 + ... + 19253.

It is an arithmetic number, because the mean of its divisors is an integer number (14018784).

Almost surely, 2^155064978 is an apocalyptic number.

155064978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

155064978 is an abundant number, since it is smaller than the sum of its proper divisors (181385838).

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

155064978 is a wasteful number, since it uses less digits than its factorization.

155064978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12230 (or 12227 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 155064978 is about 12452.5089038314. The cubic root of 155064978 is about 537.2435876683.

The spelling of 155064978 in words is "one hundred fifty-five million, sixty-four thousand, nine hundred seventy-eight".