61251200565 has 16 divisors (see below), whose sum is σ = 98008444800. Its totient is φ = 32665132352.

The previous prime is 61251200539. The next prime is 61251200609. The reversal of 61251200565 is 56500215216.

61251200565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61251200565 - 2⁵ = 61251200533 is a prime.

It is a congruent 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, 111451 + ... + 367319.

It is an arithmetic number, because the mean of its divisors is an integer number (6125527800).

Almost surely, 2^61251200565 is an apocalyptic number.

It is an amenable number.

61251200565 is a deficient number, since it is larger than the sum of its proper divisors (36757244235).

61251200565 is a wasteful number, since it uses less digits than its factorization.

61251200565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271836.

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 61251200565 in words is "sixty-one billion, two hundred fifty-one million, two hundred thousand, five hundred sixty-five".