261416368 has 20 divisors (see below), whose sum is σ = 506764440. Its totient is φ = 130638464.

The previous prime is 261416357. The next prime is 261416371. The reversal of 261416368 is 863614162.

It is a happy number.

It is a super-2 number, since 2×261416368² = 136677034916622848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40671 + ... + 46657.

It is an arithmetic number, because the mean of its divisors is an integer number (25338222).

Almost surely, 2^261416368 is an apocalyptic number.

It is an amenable number.

261416368 is a deficient number, since it is larger than the sum of its proper divisors (245348072).

261416368 is a wasteful number, since it uses less digits than its factorization.

261416368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8724 (or 8718 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 261416368 is about 16168.3755522934. The cubic root of 261416368 is about 639.4073028414.

The spelling of 261416368 in words is "two hundred sixty-one million, four hundred sixteen thousand, three hundred sixty-eight".