7813563642 has 32 divisors (see below), whose sum is σ = 17372698560. Its totient is φ = 2603137680.

The previous prime is 7813563631. The next prime is 7813563683. The reversal of 7813563642 is 2463653187.

7813563642 is a `hidden beast` number, since 7 + 8 + 1 + 3 + 5 + 636 + 4 + 2 = 666.

It is a super-2 number, since 2×7813563642² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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, 66808 + ... + 141740.

It is an arithmetic number, because the mean of its divisors is an integer number (542896830).

Almost surely, 2^7813563642 is an apocalyptic number.

7813563642 is an abundant number, since it is smaller than the sum of its proper divisors (9559134918).

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

7813563642 is a wasteful number, since it uses less digits than its factorization.

7813563642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76875 (or 76869 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 7813563642 is about 88394.3643113066. The cubic root of 7813563642 is about 1984.3413602835.

The spelling of 7813563642 in words is "seven billion, eight hundred thirteen million, five hundred sixty-three thousand, six hundred forty-two".