261655501225175 has 24 divisors (see below), whose sum is σ = 338621352560640. Its totient is φ = 200186740450400.

The previous prime is 261655501225123. The next prime is 261655501225211. The reversal of 261655501225175 is 571522105556162.

It is not a de Polignac number, because 261655501225175 - 2¹⁰ = 261655501224151 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38441915 + ... + 44733564.

It is an arithmetic number, because the mean of its divisors is an integer number (14109223023360).

Almost surely, 2^{261655501225175} is an apocalyptic number.

261655501225175 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261655501225175 is a deficient number, since it is larger than the sum of its proper divisors (76965851335465).

261655501225175 is a wasteful number, since it uses less digits than its factorization.

261655501225175 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83180983 (or 83180978 counting only the distinct ones).

The product of its (nonzero) digits is 6300000, while the sum is 53.

The spelling of 261655501225175 in words is "two hundred sixty-one trillion, six hundred fifty-five billion, five hundred one million, two hundred twenty-five thousand, one hundred seventy-five".