261479905754 has 16 divisors (see below), whose sum is σ = 397771166016. Its totient is φ = 128889768000.

The previous prime is 261479905733. The next prime is 261479905769. The reversal of 261479905754 is 457509974162.

It is a happy number.

It is a super-2 number, since 2×261479905754² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261479905693 and 261479905702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2357954 + ... + 2466354.

It is an arithmetic number, because the mean of its divisors is an integer number (24860697876).

Almost surely, 2^261479905754 is an apocalyptic number.

261479905754 is a deficient number, since it is larger than the sum of its proper divisors (136291260262).

261479905754 is a wasteful number, since it uses less digits than its factorization.

261479905754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125461.

The product of its (nonzero) digits is 19051200, while the sum is 59.

The spelling of 261479905754 in words is "two hundred sixty-one billion, four hundred seventy-nine million, nine hundred five thousand, seven hundred fifty-four".