261554112504472 has 32 divisors (see below), whose sum is σ = 516291061057200. Its totient is φ = 123878251929600.

The previous prime is 261554112504413. The next prime is 261554112504481. The reversal of 261554112504472 is 274405211455162.

It is a congruent number.

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, 108535929 + ... + 110919592.

Almost surely, 2^{261554112504472} is an apocalyptic number.

It is an amenable number.

261554112504472 is a deficient number, since it is larger than the sum of its proper divisors (254736948552728).

261554112504472 is a wasteful number, since it uses less digits than its factorization.

261554112504472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219463387 (or 219463383 counting only the distinct ones).

The product of its (nonzero) digits is 2688000, while the sum is 49.

The spelling of 261554112504472 in words is "two hundred sixty-one trillion, five hundred fifty-four billion, one hundred twelve million, five hundred four thousand, four hundred seventy-two".