561156069 has 4 divisors (see below), whose sum is σ = 748208096. Its totient is φ = 374104044.

The previous prime is 561156067. The next prime is 561156109. The reversal of 561156069 is 960651165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 561156069 - 2¹ = 561156067 is a prime.

It is a super-2 number, since 2×561156069² = 629792267551065522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561156067) 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, 93526009 + ... + 93526014.

It is an arithmetic number, because the mean of its divisors is an integer number (187052024).

Almost surely, 2^561156069 is an apocalyptic number.

It is an amenable number.

561156069 is a deficient number, since it is larger than the sum of its proper divisors (187052027).

561156069 is a wasteful number, since it uses less digits than its factorization.

561156069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187052026.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 561156069 is about 23688.7329547192. The cubic root of 561156069 is about 824.8238713083.

The spelling of 561156069 in words is "five hundred sixty-one million, one hundred fifty-six thousand, sixty-nine".