3874451361638 has 128 divisors (see below), whose sum is σ = 7103351808000. Its totient is φ = 1570843048320.

The previous prime is 3874451361629. The next prime is 3874451361653. The reversal of 3874451361638 is 8361631544783.

It is a super-2 number, since 2×3874451361638² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 179453348 + ... + 179474936.

It is an arithmetic number, because the mean of its divisors is an integer number (55494936000).

Almost surely, 2^{3874451361638} is an apocalyptic number.

3874451361638 is a deficient number, since it is larger than the sum of its proper divisors (3228900446362).

3874451361638 is a wasteful number, since it uses less digits than its factorization.

3874451361638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21767 (or 21741 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 59.

The spelling of 3874451361638 in words is "three trillion, eight hundred seventy-four billion, four hundred fifty-one million, three hundred sixty-one thousand, six hundred thirty-eight".