53561505672 has 24 divisors (see below), whose sum is σ = 145062411390. Its totient is φ = 17853835200.

The previous prime is 53561505671. The next prime is 53561505677. The reversal of 53561505672 is 27650516535.

53561505672 is a `hidden beast` number, since 5 + 35 + 6 + 1 + 50 + 567 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 46892170116 + 6669335556 = 216546^2 + 81666^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (53561505671) 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 5 ways as a sum of consecutive naturals, for example, 371954829 + ... + 371954972.

Almost surely, 2^53561505672 is an apocalyptic number.

It is an amenable number.

53561505672 is an abundant number, since it is smaller than the sum of its proper divisors (91500905718).

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

53561505672 is a wasteful number, since it uses less digits than its factorization.

53561505672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743909813 (or 743909806 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 45.

The spelling of 53561505672 in words is "fifty-three billion, five hundred sixty-one million, five hundred five thousand, six hundred seventy-two".