377670667561 has 24 divisors (see below), whose sum is σ = 434508663456. Its totient is φ = 325502432640.

The previous prime is 377670667553. The next prime is 377670667579. The reversal of 377670667561 is 165766076773.

It is not a de Polignac number, because 377670667561 - 2³ = 377670667553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 377670667561.

It is not an unprimeable number, because it can be changed into a prime (377670667061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 370366 + ... + 944728.

It is an arithmetic number, because the mean of its divisors is an integer number (18104527644).

Almost surely, 2^377670667561 is an apocalyptic number.

It is an amenable number.

377670667561 is a deficient number, since it is larger than the sum of its proper divisors (56837995895).

377670667561 is a wasteful number, since it uses less digits than its factorization.

377670667561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574533 (or 574510 counting only the distinct ones).

The product of its (nonzero) digits is 46675440, while the sum is 61.

The spelling of 377670667561 in words is "three hundred seventy-seven billion, six hundred seventy million, six hundred sixty-seven thousand, five hundred sixty-one".