155166051656 has 128 divisors (see below), whose sum is σ = 385639833600. Its totient is φ = 56734529280.

The previous prime is 155166051631. The next prime is 155166051659. The reversal of 155166051656 is 656150661551.

It is a self number, because there is not a number n which added to its sum of digits gives 155166051656.

It is not an unprimeable number, because it can be changed into a prime (155166051659) 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 31 ways as a sum of consecutive naturals, for example, 647585 + ... + 854223.

It is an arithmetic number, because the mean of its divisors is an integer number (3012811200).

Almost surely, 2^155166051656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155166051656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192819916800).

155166051656 is an abundant number, since it is smaller than the sum of its proper divisors (230473781944).

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

155166051656 is a wasteful number, since it uses less digits than its factorization.

155166051656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206739 (or 206735 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 155166051656 in words is "one hundred fifty-five billion, one hundred sixty-six million, fifty-one thousand, six hundred fifty-six".