155260657 has 2 divisors, whose sum is σ = 155260658. Its totient is φ = 155260656.

The previous prime is 155260631. The next prime is 155260661. The reversal of 155260657 is 756062551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93103201 + 62157456 = 9649^2 + 7884^2 .

It is a cyclic number.

It is not a de Polignac number, because 155260657 - 2¹⁵ = 155227889 is a prime.

It is a super-2 number, since 2×155260657² = 48211743224143298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155260607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77630328 + 77630329.

It is an arithmetic number, because the mean of its divisors is an integer number (77630329).

Almost surely, 2^155260657 is an apocalyptic number.

It is an amenable number.

155260657 is a deficient number, since it is larger than the sum of its proper divisors (1).

155260657 is an equidigital number, since it uses as much as digits as its factorization.

155260657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 155260657 is about 12460.3634377172. The cubic root of 155260657 is about 537.4694781298.

The spelling of 155260657 in words is "one hundred fifty-five million, two hundred sixty thousand, six hundred fifty-seven".