7697132640 has 72 divisors (see below), whose sum is σ = 26266470048. Its totient is φ = 2052568320.

The previous prime is 7697132627. The next prime is 7697132669. The reversal of 7697132640 is 462317967.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-3 number, since 3×7697132640³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2671176 + ... + 2674055.

It is an arithmetic number, because the mean of its divisors is an integer number (364812084).

Almost surely, 2^7697132640 is an apocalyptic number.

It is an amenable number.

7697132640 is an abundant number, since it is smaller than the sum of its proper divisors (18569337408).

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

7697132640 is a wasteful number, since it uses less digits than its factorization.

7697132640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5345252 (or 5345241 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 7697132640 is about 87733.3040526800. The cubic root of 7697132640 is about 1974.4356783259.

The spelling of 7697132640 in words is "seven billion, six hundred ninety-seven million, one hundred thirty-two thousand, six hundred forty".