561672837 has 24 divisors (see below), whose sum is σ = 905649888. Its totient is φ = 332488800.

The previous prime is 561672833. The next prime is 561672863. The reversal of 561672837 is 738276165.

561672837 is a `hidden beast` number, since 5 + 616 + 7 + 28 + 3 + 7 = 666.

It is not a de Polignac number, because 561672837 - 2² = 561672833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561672792 and 561672801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561672833) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61714 + ... + 70227.

It is an arithmetic number, because the mean of its divisors is an integer number (37735412).

Almost surely, 2^561672837 is an apocalyptic number.

It is an amenable number.

561672837 is a deficient number, since it is larger than the sum of its proper divisors (343977051).

561672837 is a wasteful number, since it uses less digits than its factorization.

561672837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132001 (or 131998 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 561672837 is about 23699.6379086264. The cubic root of 561672837 is about 825.0769867550.

The spelling of 561672837 in words is "five hundred sixty-one million, six hundred seventy-two thousand, eight hundred thirty-seven".