155116666520 has 64 divisors (see below), whose sum is σ = 367433280000. Its totient is φ = 58772780928.

The previous prime is 155116666511. The next prime is 155116666561. The reversal of 155116666520 is 25666611551.

It is a happy number.

155116666520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×155116666520² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9795329 + ... + 9811151.

It is an arithmetic number, because the mean of its divisors is an integer number (5741145000).

Almost surely, 2^155116666520 is an apocalyptic number.

155116666520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155116666520 is an abundant number, since it is smaller than the sum of its proper divisors (212316613480).

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

155116666520 is a wasteful number, since it uses less digits than its factorization.

155116666520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28752 (or 28748 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 155116666520 in words is "one hundred fifty-five billion, one hundred sixteen million, six hundred sixty-six thousand, five hundred twenty".