7157761864 has 64 divisors (see below), whose sum is σ = 15179374080. Its totient is φ = 3134784000.

The previous prime is 7157761847. The next prime is 7157761879. The reversal of 7157761864 is 4681677517.

It is a happy number.

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, 629994 + ... + 641254.

It is an arithmetic number, because the mean of its divisors is an integer number (237177720).

Almost surely, 2^7157761864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7157761864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7589687040).

7157761864 is an abundant number, since it is smaller than the sum of its proper divisors (8021612216).

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

7157761864 is a wasteful number, since it uses less digits than its factorization.

7157761864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11542 (or 11538 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 52.

The square root of 7157761864 is about 84603.5570410606. The cubic root of 7157761864 is about 1927.1953916361.

The spelling of 7157761864 in words is "seven billion, one hundred fifty-seven million, seven hundred sixty-one thousand, eight hundred sixty-four".