155602515281 has 2 divisors, whose sum is σ = 155602515282. Its totient is φ = 155602515280.

The previous prime is 155602515251. The next prime is 155602515323. The reversal of 155602515281 is 182515206551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110650034881 + 44952480400 = 332641^2 + 212020^2 .

It is a cyclic number.

It is not a de Polignac number, because 155602515281 - 2³⁰ = 154528773457 is a prime.

It is a super-2 number, since 2×155602515281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155602515221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77801257640 + 77801257641.

It is an arithmetic number, because the mean of its divisors is an integer number (77801257641).

Almost surely, 2^155602515281 is an apocalyptic number.

It is an amenable number.

155602515281 is a deficient number, since it is larger than the sum of its proper divisors (1).

155602515281 is an equidigital number, since it uses as much as digits as its factorization.

155602515281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120000, while the sum is 41.

The spelling of 155602515281 in words is "one hundred fifty-five billion, six hundred two million, five hundred fifteen thousand, two hundred eighty-one".