561397677 has 8 divisors (see below), whose sum is σ = 762653664. Its totient is φ = 367203408.

The previous prime is 561397651. The next prime is 561397679. The reversal of 561397677 is 776793165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561397677 - 2⁷ = 561397549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561397679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1765243 + ... + 1765560.

It is an arithmetic number, because the mean of its divisors is an integer number (95331708).

Almost surely, 2^561397677 is an apocalyptic number.

It is an amenable number.

561397677 is a deficient number, since it is larger than the sum of its proper divisors (201255987).

561397677 is a wasteful number, since it uses less digits than its factorization.

561397677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3530859.

The product of its digits is 1666980, while the sum is 51.

The square root of 561397677 is about 23693.8320454923. The cubic root of 561397677 is about 824.9422314004.

The spelling of 561397677 in words is "five hundred sixty-one million, three hundred ninety-seven thousand, six hundred seventy-seven".