261650172527 has 2 divisors, whose sum is σ = 261650172528. Its totient is φ = 261650172526.

The previous prime is 261650172517. The next prime is 261650172559. The reversal of 261650172527 is 725271056162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261650172527 - 2⁸ = 261650172271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261650172517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130825086263 + 130825086264.

It is an arithmetic number, because the mean of its divisors is an integer number (130825086264).

Almost surely, 2^261650172527 is an apocalyptic number.

261650172527 is a deficient number, since it is larger than the sum of its proper divisors (1).

261650172527 is an equidigital number, since it uses as much as digits as its factorization.

261650172527 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 261650172527 in words is "two hundred sixty-one billion, six hundred fifty million, one hundred seventy-two thousand, five hundred twenty-seven".