261125776 has 20 divisors (see below), whose sum is σ = 506811312. Its totient is φ = 130335776.

The previous prime is 261125633. The next prime is 261125789. The reversal of 261125776 is 677521162.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4510 + ... + 23293.

Almost surely, 2^261125776 is an apocalyptic number.

It is an amenable number.

261125776 is a deficient number, since it is larger than the sum of its proper divisors (245685536).

261125776 is a wasteful number, since it uses less digits than its factorization.

261125776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28398 (or 28392 counting only the distinct ones).

The product of its digits is 35280, while the sum is 37.

The square root of 261125776 is about 16159.3866220225. The cubic root of 261125776 is about 639.1702920033.

The spelling of 261125776 in words is "two hundred sixty-one million, one hundred twenty-five thousand, seven hundred seventy-six".