7961713864 has 16 divisors (see below), whose sum is σ = 16076537820. Its totient is φ = 3674637120.

The previous prime is 7961713847. The next prime is 7961713873. The reversal of 7961713864 is 4683171697.

It can be written as a sum of positive squares in 2 ways, for example, as 6813181764 + 1148532100 = 82542^2 + 33890^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38277367 + ... + 38277574.

Almost surely, 2^7961713864 is an apocalyptic number.

It is an amenable number.

7961713864 is an abundant number, since it is smaller than the sum of its proper divisors (8114823956).

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

7961713864 is a wasteful number, since it uses less digits than its factorization.

7961713864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76554960 (or 76554956 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 52.

The square root of 7961713864 is about 89228.4364090283. The cubic root of 7961713864 is about 1996.8043854098.

The spelling of 7961713864 in words is "seven billion, nine hundred sixty-one million, seven hundred thirteen thousand, eight hundred sixty-four".