761331640 has 32 divisors (see below), whose sum is σ = 1714750560. Its totient is φ = 304220800.

The previous prime is 761331619. The next prime is 761331661. The reversal of 761331640 is 46133167.

It is an interprime number because it is at equal distance from previous prime (761331619) and next prime (761331661).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32010 + ... + 50470.

It is an arithmetic number, because the mean of its divisors is an integer number (53585955).

Almost surely, 2^761331640 is an apocalyptic number.

It is an amenable number.

761331640 is an abundant number, since it is smaller than the sum of its proper divisors (953418920).

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

761331640 is a wasteful number, since it uses less digits than its factorization.

761331640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19503 (or 19499 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 761331640 is about 27592.2387638263. The cubic root of 761331640 is about 913.1132111413.

It can be divided in two parts, 76 and 1331640, that added together give a square (1331716 = 1154²).

The spelling of 761331640 in words is "seven hundred sixty-one million, three hundred thirty-one thousand, six hundred forty".