53872000561 has 4 divisors (see below), whose sum is σ = 53924152612. Its totient is φ = 53819848512.

The previous prime is 53872000547. The next prime is 53872000571. The reversal of 53872000561 is 16500027835.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34130345536 + 19741655025 = 184744^2 + 140505^2 .

It is a cyclic number.

It is not a de Polignac number, because 53872000561 - 2⁵ = 53872000529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53872000561.

It is not an unprimeable number, because it can be changed into a prime (53872000571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26074476 + ... + 26076541.

It is an arithmetic number, because the mean of its divisors is an integer number (13481038153).

Almost surely, 2^53872000561 is an apocalyptic number.

53872000561 is the 124065-th centered heptagonal number.

It is an amenable number.

53872000561 is a deficient number, since it is larger than the sum of its proper divisors (52152051).

53872000561 is a wasteful number, since it uses less digits than its factorization.

53872000561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52152050.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 53872000561 in words is "fifty-three billion, eight hundred seventy-two million, five hundred sixty-one", and thus it is an aban number.