377316561 has 16 divisors (see below), whose sum is σ = 514252800. Its totient is φ = 246022608.

The previous prime is 377316557. The next prime is 377316571. The reversal of 377316561 is 165613773.

It is not a de Polignac number, because 377316561 - 2² = 377316557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (377316551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17920 + ... + 32798.

It is an arithmetic number, because the mean of its divisors is an integer number (32140800).

Almost surely, 2^377316561 is an apocalyptic number.

It is an amenable number.

377316561 is a deficient number, since it is larger than the sum of its proper divisors (136936239).

377316561 is a wasteful number, since it uses less digits than its factorization.

377316561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15068.

The product of its digits is 79380, while the sum is 39.

The square root of 377316561 is about 19424.6379889047. The cubic root of 377316561 is about 722.6066530773.

The spelling of 377316561 in words is "three hundred seventy-seven million, three hundred sixteen thousand, five hundred sixty-one".