155778962085928 has 8 divisors (see below), whose sum is σ = 292085553911130. Its totient is φ = 77889481042960.

The previous prime is 155778962085893. The next prime is 155778962085961. The reversal of 155778962085928 is 829580269877551.

It can be written as a sum of positive squares in only one way, i.e., 87039906112324 + 68739055973604 = 9329518^2 + 8290902^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9736185130363 + ... + 9736185130378.

Almost surely, 2^{155778962085928} is an apocalyptic number.

It is an amenable number.

155778962085928 is a deficient number, since it is larger than the sum of its proper divisors (136306591825202).

155778962085928 is a wasteful number, since it uses less digits than its factorization.

155778962085928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19472370260747 (or 19472370260743 counting only the distinct ones).

The product of its (nonzero) digits is 6096384000, while the sum is 82.

The spelling of 155778962085928 in words is "one hundred fifty-five trillion, seven hundred seventy-eight billion, nine hundred sixty-two million, eighty-five thousand, nine hundred twenty-eight".