261905002 has 16 divisors (see below), whose sum is σ = 419474880. Its totient is φ = 122344992.

The previous prime is 261904997. The next prime is 261905011. The reversal of 261905002 is 200509162.

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, 64227 + ... + 68182.

It is an arithmetic number, because the mean of its divisors is an integer number (26217180).

Almost surely, 2^261905002 is an apocalyptic number.

261905002 is a deficient number, since it is larger than the sum of its proper divisors (157569878).

261905002 is a wasteful number, since it uses less digits than its factorization.

261905002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132477.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 261905002 is about 16183.4792921671. The cubic root of 261905002 is about 639.8054437917.

The spelling of 261905002 in words is "two hundred sixty-one million, nine hundred five thousand, two".