155290764971 has 2 divisors, whose sum is σ = 155290764972. Its totient is φ = 155290764970.

The previous prime is 155290764961. The next prime is 155290764991. The reversal of 155290764971 is 179467092551.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155290764971 - 2³⁴ = 138110895787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (155290764911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77645382485 + 77645382486.

It is an arithmetic number, because the mean of its divisors is an integer number (77645382486).

Almost surely, 2^155290764971 is an apocalyptic number.

155290764971 is a deficient number, since it is larger than the sum of its proper divisors (1).

155290764971 is an equidigital number, since it uses as much as digits as its factorization.

155290764971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4762800, while the sum is 56.

The spelling of 155290764971 in words is "one hundred fifty-five billion, two hundred ninety million, seven hundred sixty-four thousand, nine hundred seventy-one".