561669519 has 8 divisors (see below), whose sum is σ = 759151792. Its totient is φ = 369316800.

The previous prime is 561669491. The next prime is 561669523. The reversal of 561669519 is 915966165.

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

It is not a de Polignac number, because 561669519 - 2⁵ = 561669487 is a prime.

It is a super-2 number, since 2×561669519² = 630945297147382722, 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 (561669529) 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, 1282132 + ... + 1282569.

It is an arithmetic number, because the mean of its divisors is an integer number (94893974).

Almost surely, 2^561669519 is an apocalyptic number.

561669519 is a deficient number, since it is larger than the sum of its proper divisors (197482273).

561669519 is a wasteful number, since it uses less digits than its factorization.

561669519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564777.

The product of its digits is 437400, while the sum is 48.

The square root of 561669519 is about 23699.5679074535. The cubic root of 561669519 is about 825.0753620780.

The spelling of 561669519 in words is "five hundred sixty-one million, six hundred sixty-nine thousand, five hundred nineteen".