561336091 has 16 divisors (see below), whose sum is σ = 606657600. Its totient is φ = 518094720.

The previous prime is 561336077. The next prime is 561336103. The reversal of 561336091 is 190633165.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561336091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561336031) 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, 70585 + ... + 78133.

It is an arithmetic number, because the mean of its divisors is an integer number (37916100).

Almost surely, 2^561336091 is an apocalyptic number.

561336091 is a deficient number, since it is larger than the sum of its proper divisors (45321509).

561336091 is a wasteful number, since it uses less digits than its factorization.

561336091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7686.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 561336091 is about 23692.5323889195. The cubic root of 561336091 is about 824.9120645791.

The spelling of 561336091 in words is "five hundred sixty-one million, three hundred thirty-six thousand, ninety-one".