635457027664 has 40 divisors (see below), whose sum is σ = 1252166418720. Its totient is φ = 312318173568.

The previous prime is 635457027643. The next prime is 635457027739. The reversal of 635457027664 is 466720754536.

It is a happy number.

It is a super-2 number, since 2×635457027664² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18270739 + ... + 18305485.

It is an arithmetic number, because the mean of its divisors is an integer number (31304160468).

Almost surely, 2^635457027664 is an apocalyptic number.

It is an amenable number.

635457027664 is a deficient number, since it is larger than the sum of its proper divisors (616709391056).

635457027664 is a wasteful number, since it uses less digits than its factorization.

635457027664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54187 (or 54181 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 55.

The spelling of 635457027664 in words is "six hundred thirty-five billion, four hundred fifty-seven million, twenty-seven thousand, six hundred sixty-four".