561940615 has 4 divisors (see below), whose sum is σ = 674328744. Its totient is φ = 449552488.

The previous prime is 561940597. The next prime is 561940619. The reversal of 561940615 is 516049165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561940615 - 2⁹ = 561940103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561940619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56194057 + ... + 56194066.

It is an arithmetic number, because the mean of its divisors is an integer number (168582186).

Almost surely, 2^561940615 is an apocalyptic number.

561940615 is a deficient number, since it is larger than the sum of its proper divisors (112388129).

561940615 is a wasteful number, since it uses less digits than its factorization.

561940615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112388128.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 561940615 is about 23705.2866466533. The cubic root of 561940615 is about 825.2080846406.

The spelling of 561940615 in words is "five hundred sixty-one million, nine hundred forty thousand, six hundred fifteen".