7645157664 has 48 divisors (see below), whose sum is σ = 20097756000. Its totient is φ = 2544675840.

The previous prime is 7645157627. The next prime is 7645157687. The reversal of 7645157664 is 4667515467.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

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, 8712 + ... + 123960.

It is an arithmetic number, because the mean of its divisors is an integer number (418703250).

Almost surely, 2^7645157664 is an apocalyptic number.

It is an amenable number.

7645157664 is an abundant number, since it is smaller than the sum of its proper divisors (12452598336).

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

7645157664 is a wasteful number, since it uses less digits than its factorization.

7645157664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115953 (or 115945 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 51.

The square root of 7645157664 is about 87436.5922483259. The cubic root of 7645157664 is about 1969.9815044602.

The spelling of 7645157664 in words is "seven billion, six hundred forty-five million, one hundred fifty-seven thousand, six hundred sixty-four".