155919492772 has 12 divisors (see below), whose sum is σ = 273100802380. Its totient is φ = 77890692096.

The previous prime is 155919492733. The next prime is 155919492779. The reversal of 155919492772 is 277294919551.

155919492772 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5456185956 + 150463306816 = 73866^2 + 387896^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 155919492772.

It is not an unprimeable number, because it can be changed into a prime (155919492779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17258493 + ... + 17267524.

Almost surely, 2^155919492772 is an apocalyptic number.

It is an amenable number.

155919492772 is a deficient number, since it is larger than the sum of its proper divisors (117181309608).

155919492772 is a wasteful number, since it uses less digits than its factorization.

155919492772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34527150 (or 34527148 counting only the distinct ones).

The product of its digits is 14288400, while the sum is 61.

The spelling of 155919492772 in words is "one hundred fifty-five billion, nine hundred nineteen million, four hundred ninety-two thousand, seven hundred seventy-two".