761599961 has 4 divisors (see below), whose sum is σ = 779311632. Its totient is φ = 743888292.

The previous prime is 761599957. The next prime is 761599987. The reversal of 761599961 is 169995167.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 761599961 - 2² = 761599957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (761599901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8855771 + ... + 8855856.

It is an arithmetic number, because the mean of its divisors is an integer number (194827908).

Almost surely, 2^761599961 is an apocalyptic number.

It is an amenable number.

761599961 is a deficient number, since it is larger than the sum of its proper divisors (17711671).

761599961 is a wasteful number, since it uses less digits than its factorization.

761599961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17711670.

The product of its digits is 918540, while the sum is 53.

The square root of 761599961 is about 27597.1005904606. The cubic root of 761599961 is about 913.2204699930.

The spelling of 761599961 in words is "seven hundred sixty-one million, five hundred ninety-nine thousand, nine hundred sixty-one".