634488039477 has 48 divisors (see below), whose sum is σ = 992160973440. Its totient is φ = 389522238336.

The previous prime is 634488039469. The next prime is 634488039547. The reversal of 634488039477 is 774930884436.

It is a happy number.

634488039477 is a `hidden beast` number, since 63 + 4 + 48 + 80 + 394 + 77 = 666.

It is not a de Polignac number, because 634488039477 - 2³ = 634488039469 is a prime.

It is a super-2 number, since 2×634488039477² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634488039077) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1930743 + ... + 2235339.

It is an arithmetic number, because the mean of its divisors is an integer number (20670020280).

Almost surely, 2^634488039477 is an apocalyptic number.

It is an amenable number.

634488039477 is a deficient number, since it is larger than the sum of its proper divisors (357672933963).

634488039477 is a wasteful number, since it uses less digits than its factorization.

634488039477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305002 (or 304999 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 63.

The spelling of 634488039477 in words is "six hundred thirty-four billion, four hundred eighty-eight million, thirty-nine thousand, four hundred seventy-seven".