1638313606860 has 192 divisors, whose sum is σ = 5653129466880. Its totient is φ = 346109829120.

The previous prime is 1638313606859. The next prime is 1638313606871. The reversal of 1638313606860 is 686063138361.

It is a happy 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, 2176509 + ... + 2830868.

It is an arithmetic number, because the mean of its divisors is an integer number (29443382640).

Almost surely, 2^{1638313606860} is an apocalyptic number.

1638313606860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1638313606860 is an abundant number, since it is smaller than the sum of its proper divisors (4014815860020).

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

1638313606860 is a wasteful number, since it uses less digits than its factorization.

1638313606860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5007456 (or 5007454 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 1638313606860 in words is "one trillion, six hundred thirty-eight billion, three hundred thirteen million, six hundred six thousand, eight hundred sixty".