7621327638 has 16 divisors (see below), whose sum is σ = 16936283760. Its totient is φ = 2540442528.

The previous prime is 7621327621. The next prime is 7621327657. The reversal of 7621327638 is 8367231267.

7621327638 is a `hidden beast` number, since 7 + 6 + 2 + 1 + 3 + 2 + 7 + 638 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 7621327593 and 7621327602.

It is a congruent number.

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, 70567795 + ... + 70567902.

It is an arithmetic number, because the mean of its divisors is an integer number (1058517735).

Almost surely, 2^7621327638 is an apocalyptic number.

7621327638 is an abundant number, since it is smaller than the sum of its proper divisors (9314956122).

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

7621327638 is a wasteful number, since it uses less digits than its factorization.

7621327638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141135708 (or 141135702 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 7621327638 is about 87300.2155667442. The cubic root of 7621327638 is about 1967.9325573631.

The spelling of 7621327638 in words is "seven billion, six hundred twenty-one million, three hundred twenty-seven thousand, six hundred thirty-eight".