155622866856 has 64 divisors (see below), whose sum is σ = 392607025920. Its totient is φ = 51401226240.

The previous prime is 155622866851. The next prime is 155622866881. The reversal of 155622866856 is 658668226551.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 155622866856.

It is not an unprimeable number, because it can be changed into a prime (155622866851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16004076 + ... + 16013796.

It is an arithmetic number, because the mean of its divisors is an integer number (6134484780).

Almost surely, 2^155622866856 is an apocalyptic number.

It is an amenable number.

155622866856 is an abundant number, since it is smaller than the sum of its proper divisors (236984159064).

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

155622866856 is a wasteful number, since it uses less digits than its factorization.

155622866856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15746 (or 15742 counting only the distinct ones).

The product of its digits is 41472000, while the sum is 60.

The spelling of 155622866856 in words is "one hundred fifty-five billion, six hundred twenty-two million, eight hundred sixty-six thousand, eight hundred fifty-six".