261276716 has 12 divisors (see below), whose sum is σ = 457945488. Its totient is φ = 130435152.

The previous prime is 261276707. The next prime is 261276727. The reversal of 261276716 is 617672162.

It is a self number, because there is not a number n which added to its sum of digits gives 261276716.

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, 47891 + ... + 53066.

It is an arithmetic number, because the mean of its divisors is an integer number (38162124).

Almost surely, 2^261276716 is an apocalyptic number.

It is an amenable number.

261276716 is a deficient number, since it is larger than the sum of its proper divisors (196668772).

261276716 is a wasteful number, since it uses less digits than its factorization.

261276716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101608 (or 101606 counting only the distinct ones).

The product of its digits is 42336, while the sum is 38.

The square root of 261276716 is about 16164.0562978480. The cubic root of 261276716 is about 639.2934226806.

The spelling of 261276716 in words is "two hundred sixty-one million, two hundred seventy-six thousand, seven hundred sixteen".