561520545755 has 16 divisors (see below), whose sum is σ = 730954101024. Its totient is φ = 411634594560.

The previous prime is 561520545623. The next prime is 561520545767. The reversal of 561520545755 is 557545025165.

It is not a de Polignac number, because 561520545755 - 2¹⁰ = 561520544731 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31519481 + ... + 31537290.

It is an arithmetic number, because the mean of its divisors is an integer number (45684631314).

Almost surely, 2^561520545755 is an apocalyptic number.

561520545755 is a deficient number, since it is larger than the sum of its proper divisors (169433555269).

561520545755 is a wasteful number, since it uses less digits than its factorization.

561520545755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63056926.

The product of its (nonzero) digits is 5250000, while the sum is 50.

The spelling of 561520545755 in words is "five hundred sixty-one billion, five hundred twenty million, five hundred forty-five thousand, seven hundred fifty-five".