1376487404644 has 81 divisors (see below), whose sum is σ = 2813555967019. Its totient is φ = 588683898880.

The previous prime is 1376487404639. The next prime is 1376487404701. The reversal of 1376487404644 is 4464047846731.

The square root of 1376487404644 is 1173238.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1029896166244 + 346591238400 = 1014838^2 + 588720^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 438789444 + ... + 438792580.

Almost surely, 2^{1376487404644} is an apocalyptic number.

1376487404644 is the 1173238-th square number.

It is an amenable number.

1376487404644 is an abundant number, since it is smaller than the sum of its proper divisors (1437068562375).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1376487404644 is an equidigital number, since it uses as much as digits as its factorization.

1376487404644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6334 (or 3167 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 58.

The spelling of 1376487404644 in words is "one trillion, three hundred seventy-six billion, four hundred eighty-seven million, four hundred four thousand, six hundred forty-four".