635720550376980 has 96 divisors (see below), whose sum is σ = 1790005143427200. Its totient is φ = 168574325774848.

The previous prime is 635720550376973. The next prime is 635720550376991. The reversal of 635720550376980 is 89673055027536.

It is a super-2 number, since 2×635720550376980² (a number of 30 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 31 ways as a sum of consecutive naturals, for example, 456108586 + ... + 457500254.

It is an arithmetic number, because the mean of its divisors is an integer number (18645886910700).

Almost surely, 2^{635720550376980} is an apocalyptic number.

635720550376980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

635720550376980 is an abundant number, since it is smaller than the sum of its proper divisors (1154284593050220).

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

635720550376980 is a wasteful number, since it uses less digits than its factorization.

635720550376980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434393 (or 1434391 counting only the distinct ones).

The product of its (nonzero) digits is 285768000, while the sum is 66.

The spelling of 635720550376980 in words is "six hundred thirty-five trillion, seven hundred twenty billion, five hundred fifty million, three hundred seventy-six thousand, nine hundred eighty".