761816672991 has 24 divisors (see below), whose sum is σ = 1244899079424. Its totient is φ = 461707072920.

The previous prime is 761816672987. The next prime is 761816673019. The reversal of 761816672991 is 199276618167.

761816672991 is a `hidden beast` number, since 7 + 618 + 1 + 6 + 6 + 7 + 2 + 9 + 9 + 1 = 666.

It is not a de Polignac number, because 761816672991 - 2² = 761816672987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (761816672891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142499511 + ... + 142504856.

It is an arithmetic number, because the mean of its divisors is an integer number (51870794976).

Almost surely, 2^761816672991 is an apocalyptic number.

761816672991 is a deficient number, since it is larger than the sum of its proper divisors (483082406433).

761816672991 is a wasteful number, since it uses less digits than its factorization.

761816672991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285004393 (or 285004381 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 63.

The spelling of 761816672991 in words is "seven hundred sixty-one billion, eight hundred sixteen million, six hundred seventy-two thousand, nine hundred ninety-one".