1376638845 has 16 divisors (see below), whose sum is σ = 2278575360. Its totient is φ = 708889664.

The previous prime is 1376638727. The next prime is 1376638871. The reversal of 1376638845 is 5488366731.

It is a cyclic number.

It is not a de Polignac number, because 1376638845 - 2¹⁴ = 1376622461 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1581909 + ... + 1582778.

It is an arithmetic number, because the mean of its divisors is an integer number (142410960).

Almost surely, 2^1376638845 is an apocalyptic number.

1376638845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1376638845 is a deficient number, since it is larger than the sum of its proper divisors (901936515).

1376638845 is a wasteful number, since it uses less digits than its factorization.

1376638845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3164724.

The product of its digits is 2903040, while the sum is 51.

The square root of 1376638845 is about 37103.0840362361. The cubic root of 1376638845 is about 1112.4316588074.

The spelling of 1376638845 in words is "one billion, three hundred seventy-six million, six hundred thirty-eight thousand, eight hundred forty-five".