6638344548 has 48 divisors (see below), whose sum is σ = 17632290816. Its totient is φ = 1924156960.

The previous prime is 6638344543. The next prime is 6638344553. The reversal of 6638344548 is 8454438366.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6638344543) and next prime (6638344553).

It is a super-2 number, since 2×6638344548² = 88135236675922648608, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6638344548.

It is not an unprimeable number, because it can be changed into a prime (6638344543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1090236 + ... + 1096307.

It is an arithmetic number, because the mean of its divisors is an integer number (367339392).

Almost surely, 2^6638344548 is an apocalyptic number.

It is an amenable number.

6638344548 is an abundant number, since it is smaller than the sum of its proper divisors (10993946268).

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

6638344548 is a wasteful number, since it uses less digits than its factorization.

6638344548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186584 (or 2186582 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 51.

The square root of 6638344548 is about 81476.0366488209. The cubic root of 6638344548 is about 1879.4030611964.

The spelling of 6638344548 in words is "six billion, six hundred thirty-eight million, three hundred forty-four thousand, five hundred forty-eight".