631464136 has 8 divisors (see below), whose sum is σ = 1183995270. Its totient is φ = 315732064.

The previous prime is 631464109. The next prime is 631464137.

631464136 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 440748036 + 190716100 = 20994^2 + 13810^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (631464137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39466501 + ... + 39466516.

Almost surely, 2^631464136 is an apocalyptic number.

It is an amenable number.

631464136 is a deficient number, since it is larger than the sum of its proper divisors (552531134).

631464136 is a wasteful number, since it uses less digits than its factorization.

631464136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78933023 (or 78933019 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 631464136 is about 25128.9501571395. The cubic root of 631464136 is about 857.9254738999.

The spelling of 631464136 in words is "six hundred thirty-one million, four hundred sixty-four thousand, one hundred thirty-six".