7257637680 has 80 divisors (see below), whose sum is σ = 22923220320. Its totient is φ = 1898850304.

The previous prime is 7257637663. The next prime is 7257637691. The reversal of 7257637680 is 867367527.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272565 + ... + 298004.

It is an arithmetic number, because the mean of its divisors is an integer number (286540254).

Almost surely, 2^7257637680 is an apocalyptic number.

It is an amenable number.

7257637680 is an abundant number, since it is smaller than the sum of its proper divisors (15665582640).

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

7257637680 is a wasteful number, since it uses less digits than its factorization.

7257637680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570638 (or 570632 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 51.

The square root of 7257637680 is about 85191.7700250441. The cubic root of 7257637680 is about 1936.1177258625.

The spelling of 7257637680 in words is "seven billion, two hundred fifty-seven million, six hundred thirty-seven thousand, six hundred eighty".