1379536641 has 72 divisors (see below), whose sum is σ = 2412844200. Its totient is φ = 756403200.

The previous prime is 1379536637. The next prime is 1379536651. The reversal of 1379536641 is 1466359731.

It is a happy number.

1379536641 is a `hidden beast` number, since 1 + 3 + 79 + 536 + 6 + 41 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 299428416 + 1080108225 = 17304^2 + 32865^2 .

It is not a de Polignac number, because 1379536641 - 2² = 1379536637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1379536651) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3440041 + ... + 3440441.

It is an arithmetic number, because the mean of its divisors is an integer number (33511725).

Almost surely, 2^1379536641 is an apocalyptic number.

It is an amenable number.

1379536641 is a deficient number, since it is larger than the sum of its proper divisors (1033307559).

1379536641 is a wasteful number, since it uses less digits than its factorization.

1379536641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 709 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 1379536641 is about 37142.1141159197. The cubic root of 1379536641 is about 1113.2116602324.

The spelling of 1379536641 in words is "one billion, three hundred seventy-nine million, five hundred thirty-six thousand, six hundred forty-one".