1377657513 has 12 divisors (see below), whose sum is σ = 1990279408. Its totient is φ = 918286200.

The previous prime is 1377657443. The next prime is 1377657527. The reversal of 1377657513 is 3157567731.

1377657513 is a `hidden beast` number, since 1 + 3 + 7 + 76 + 575 + 1 + 3 = 666.

It is not a de Polignac number, because 1377657513 - 2¹⁶ = 1377591977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1377657553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81438 + ... + 96888.

Almost surely, 2^1377657513 is an apocalyptic number.

It is an amenable number.

1377657513 is a deficient number, since it is larger than the sum of its proper divisors (612621895).

1377657513 is a wasteful number, since it uses less digits than its factorization.

1377657513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25364 (or 25361 counting only the distinct ones).

The product of its digits is 463050, while the sum is 45.

The square root of 1377657513 is about 37116.8090357994. The cubic root of 1377657513 is about 1112.7059789125.

It can be divided in two parts, 13776 and 57513, that added together give a square (71289 = 267²).

The spelling of 1377657513 in words is "one billion, three hundred seventy-seven million, six hundred fifty-seven thousand, five hundred thirteen".