155974272901 has 2 divisors, whose sum is σ = 155974272902. Its totient is φ = 155974272900.

The previous prime is 155974272871. The next prime is 155974272911. The reversal of 155974272901 is 109272479551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92704416676 + 63269856225 = 304474^2 + 251535^2 .

It is a cyclic number.

It is not a de Polignac number, because 155974272901 - 2²³ = 155965884293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155974272911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77987136450 + 77987136451.

It is an arithmetic number, because the mean of its divisors is an integer number (77987136451).

Almost surely, 2^155974272901 is an apocalyptic number.

It is an amenable number.

155974272901 is a deficient number, since it is larger than the sum of its proper divisors (1).

155974272901 is an equidigital number, since it uses as much as digits as its factorization.

155974272901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1587600, while the sum is 52.

The spelling of 155974272901 in words is "one hundred fifty-five billion, nine hundred seventy-four million, two hundred seventy-two thousand, nine hundred one".