1380557165 has 16 divisors (see below), whose sum is σ = 1889053488. Its totient is φ = 959517696.

The previous prime is 1380557159. The next prime is 1380557201. The reversal of 1380557165 is 5617550831.

It can be written as a sum of positive squares in 8 ways, for example, as 15476356 + 1365080809 = 3934^2 + 36947^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380557165 - 2²² = 1376362861 is a prime.

It is a Duffinian number.

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, 623582 + ... + 625791.

It is an arithmetic number, because the mean of its divisors is an integer number (118065843).

Almost surely, 2^1380557165 is an apocalyptic number.

It is an amenable number.

1380557165 is a deficient number, since it is larger than the sum of its proper divisors (508496323).

1380557165 is a wasteful number, since it uses less digits than its factorization.

1380557165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249408.

The product of its (nonzero) digits is 126000, while the sum is 41.

The square root of 1380557165 is about 37155.8496740419. The cubic root of 1380557165 is about 1113.4860951794.

The spelling of 1380557165 in words is "one billion, three hundred eighty million, five hundred fifty-seven thousand, one hundred sixty-five".