1631464064 has 16 divisors (see below), whose sum is σ = 3250182570. Its totient is φ = 815731968.

The previous prime is 1631464039. The next prime is 1631464067. The reversal of 1631464064 is 4604641361.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1628929600 + 2534464 = 40360^2 + 1592^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (1631464067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6372779 + ... + 6373034.

Almost surely, 2^1631464064 is an apocalyptic number.

It is an amenable number.

1631464064 is a deficient number, since it is larger than the sum of its proper divisors (1618718506).

1631464064 is an equidigital number, since it uses as much as digits as its factorization.

1631464064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12745827 (or 12745815 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 1631464064 is about 40391.3860123665. The cubic root of 1631464064 is about 1177.2241714293.

The spelling of 1631464064 in words is "one billion, six hundred thirty-one million, four hundred sixty-four thousand, sixty-four".