6638296654081 has 4 divisors (see below), whose sum is σ = 6653418059200. Its totient is φ = 6623175248964.

The previous prime is 6638296654021. The next prime is 6638296654091. The reversal of 6638296654081 is 1804566928366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6638296654081 - 2³¹ = 6636149170433 is a prime.

It is a super-2 number, since 2×6638296654081² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6638296654021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7560701901 + ... + 7560702778.

It is an arithmetic number, because the mean of its divisors is an integer number (1663354514800).

Almost surely, 2^{6638296654081} is an apocalyptic number.

It is an amenable number.

6638296654081 is a deficient number, since it is larger than the sum of its proper divisors (15121405119).

6638296654081 is a wasteful number, since it uses less digits than its factorization.

6638296654081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15121405118.

The product of its (nonzero) digits is 89579520, while the sum is 64.

The spelling of 6638296654081 in words is "six trillion, six hundred thirty-eight billion, two hundred ninety-six million, six hundred fifty-four thousand, eighty-one".