6635431396 has 18 divisors (see below), whose sum is σ = 12763609670. Its totient is φ = 3016104960.

The previous prime is 6635431379. The next prime is 6635431409. The reversal of 6635431396 is 6931345366.

It can be written as a sum of positive squares in only one way, i.e., 6579480996 + 55950400 = 81114^2 + 7480^2 .

It is a super-2 number, since 2×6635431396² = 88057899622045017632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6854301 + ... + 6855268.

Almost surely, 2^6635431396 is an apocalyptic number.

It is an amenable number.

6635431396 is a deficient number, since it is larger than the sum of its proper divisors (6128178274).

6635431396 is a wasteful number, since it uses less digits than its factorization.

6635431396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13709595 (or 13709582 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 46.

The square root of 6635431396 is about 81458.1573324612. The cubic root of 6635431396 is about 1879.1281036967.

The spelling of 6635431396 in words is "six billion, six hundred thirty-five million, four hundred thirty-one thousand, three hundred ninety-six".