155662117279 has 2 divisors, whose sum is σ = 155662117280. Its totient is φ = 155662117278.

The previous prime is 155662117249. The next prime is 155662117319. The reversal of 155662117279 is 972711266551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155662117279 - 2³⁷ = 18223163807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155662117249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77831058639 + 77831058640.

It is an arithmetic number, because the mean of its divisors is an integer number (77831058640).

Almost surely, 2^155662117279 is an apocalyptic number.

155662117279 is a deficient number, since it is larger than the sum of its proper divisors (1).

155662117279 is an equidigital number, since it uses as much as digits as its factorization.

155662117279 is an evil number, because the sum of its binary digits is even.

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

The spelling of 155662117279 in words is "one hundred fifty-five billion, six hundred sixty-two million, one hundred seventeen thousand, two hundred seventy-nine".