1377381915 has 240 divisors, whose sum is σ = 3267522720. Its totient is φ = 548674560.

The previous prime is 1377381899. The next prime is 1377381923. The reversal of 1377381915 is 5191837731.

It is not a de Polignac number, because 1377381915 - 2⁴ = 1377381899 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 4901575 + ... + 4901855.

It is an arithmetic number, because the mean of its divisors is an integer number (13614678).

Almost surely, 2^1377381915 is an apocalyptic number.

1377381915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1377381915 is an abundant number, since it is smaller than the sum of its proper divisors (1890140805).

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

1377381915 is a wasteful number, since it uses less digits than its factorization.

1377381915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 328 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 1377381915 is about 37113.0962734181. The cubic root of 1377381915 is about 1112.6317756627.

The spelling of 1377381915 in words is "one billion, three hundred seventy-seven million, three hundred eighty-one thousand, nine hundred fifteen".