155557408866 has 8 divisors (see below), whose sum is σ = 311114817744. Its totient is φ = 51852469620.

The previous prime is 155557408829. The next prime is 155557408879. The reversal of 155557408866 is 668804755551.

It is a sphenic number, since it is the product of 3 distinct primes.

155557408866 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12963117400 + ... + 12963117411.

It is an arithmetic number, because the mean of its divisors is an integer number (38889352218).

Almost surely, 2^155557408866 is an apocalyptic number.

155557408866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

155557408866 is a wasteful number, since it uses less digits than its factorization.

155557408866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25926234816.

The product of its (nonzero) digits is 40320000, while the sum is 60.

The spelling of 155557408866 in words is "one hundred fifty-five billion, five hundred fifty-seven million, four hundred eight thousand, eight hundred sixty-six".