155856827122 has 4 divisors (see below), whose sum is σ = 233785240686. Its totient is φ = 77928413560.

The previous prime is 155856827089. The next prime is 155856827149. The reversal of 155856827122 is 221728658551.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 117189144241 + 38667682881 = 342329^2 + 196641^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 155856827122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38964206779 + ... + 38964206782.

Almost surely, 2^155856827122 is an apocalyptic number.

155856827122 is a deficient number, since it is larger than the sum of its proper divisors (77928413564).

155856827122 is an equidigital number, since it uses as much as digits as its factorization.

155856827122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77928413563.

The product of its digits is 2688000, while the sum is 52.

The spelling of 155856827122 in words is "one hundred fifty-five billion, eight hundred fifty-six million, eight hundred twenty-seven thousand, one hundred twenty-two".