61595284464 has 80 divisors (see below), whose sum is σ = 202058615040. Its totient is φ = 17598651840.

The previous prime is 61595284363. The next prime is 61595284547. The reversal of 61595284464 is 46448259516.

It is a happy number.

61595284464 is a `hidden beast` number, since 6 + 1 + 59 + 52 + 84 + 464 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 61595284464.

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, 10181382 + ... + 10187429.

It is an arithmetic number, because the mean of its divisors is an integer number (2525732688).

Almost surely, 2^61595284464 is an apocalyptic number.

It is an amenable number.

61595284464 is an abundant number, since it is smaller than the sum of its proper divisors (140463330576).

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

61595284464 is a wasteful number, since it uses less digits than its factorization.

61595284464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20368835 (or 20368823 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The spelling of 61595284464 in words is "sixty-one billion, five hundred ninety-five million, two hundred eighty-four thousand, four hundred sixty-four".