261440004266475 has 48 divisors (see below), whose sum is σ = 447255837127680. Its totient is φ = 134614731081600.

The previous prime is 261440004266453. The next prime is 261440004266557. The reversal of 261440004266475 is 574662400044162.

It is not a de Polignac number, because 261440004266475 - 2²⁴ = 261439987489259 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133211164 + ... + 135159513.

It is an arithmetic number, because the mean of its divisors is an integer number (9317829940160).

Almost surely, 2^{261440004266475} is an apocalyptic number.

261440004266475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

261440004266475 is a deficient number, since it is larger than the sum of its proper divisors (185815832861205).

261440004266475 is a wasteful number, since it uses less digits than its factorization.

261440004266475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268371140 (or 268371135 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 51.

The spelling of 261440004266475 in words is "two hundred sixty-one trillion, four hundred forty billion, four million, two hundred sixty-six thousand, four hundred seventy-five".