155919077428 has 12 divisors (see below), whose sum is σ = 272933433892. Its totient is φ = 77938096320.

The previous prime is 155919077411. The next prime is 155919077443. The reversal of 155919077428 is 824770919551.

It can be written as a sum of positive squares in 2 ways, for example, as 68381204004 + 87537873424 = 261498^2 + 295868^2 .

It is a congruent 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, 5344233 + ... + 5373328.

Almost surely, 2^155919077428 is an apocalyptic number.

It is an amenable number.

155919077428 is a deficient number, since it is larger than the sum of its proper divisors (117014356464).

155919077428 is a wasteful number, since it uses less digits than its factorization.

155919077428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10721202 (or 10721200 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 58.

The spelling of 155919077428 in words is "one hundred fifty-five billion, nine hundred nineteen million, seventy-seven thousand, four hundred twenty-eight".