761631864 has 32 divisors (see below), whose sum is σ = 2176091520. Its totient is φ = 217609056.

The previous prime is 761631859. The next prime is 761631869. The reversal of 761631864 is 468136167.

761631864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (761631859) and next prime (761631869).

It is a super-2 number, since 2×761631864² = 1160166192520228992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (761631869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2266594 + ... + 2266929.

It is an arithmetic number, because the mean of its divisors is an integer number (68002860).

Almost surely, 2^761631864 is an apocalyptic number.

It is an amenable number.

761631864 is an abundant number, since it is smaller than the sum of its proper divisors (1414459656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

761631864 is a wasteful number, since it uses less digits than its factorization.

761631864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4533539 (or 4533535 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 761631864 is about 27597.6785980270. The cubic root of 761631864 is about 913.2332212479.

The spelling of 761631864 in words is "seven hundred sixty-one million, six hundred thirty-one thousand, eight hundred sixty-four".