561672513840 has 80 divisors (see below), whose sum is σ = 1816888497408. Its totient is φ = 143267190528.

The previous prime is 561672513781. The next prime is 561672513901. The reversal of 561672513840 is 48315276165.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 561672513840.

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, 50870614 + ... + 50881653.

Almost surely, 2^561672513840 is an apocalyptic number.

It is an amenable number.

561672513840 is an abundant number, since it is smaller than the sum of its proper divisors (1255215983568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561672513840 is a wasteful number, since it uses less digits than its factorization.

561672513840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101752306 (or 101752300 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 561672513840 in words is "five hundred sixty-one billion, six hundred seventy-two million, five hundred thirteen thousand, eight hundred forty".