61569418668 has 48 divisors (see below), whose sum is σ = 145363680000. Its totient is φ = 20281036608.

The previous prime is 61569418667. The next prime is 61569418693. The reversal of 61569418668 is 86681496516.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61569418667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 433633 + ... + 557831.

It is an arithmetic number, because the mean of its divisors is an integer number (3028410000).

Almost surely, 2^61569418668 is an apocalyptic number.

It is an amenable number.

61569418668 is an abundant number, since it is smaller than the sum of its proper divisors (83794261332).

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

61569418668 is a wasteful number, since it uses less digits than its factorization.

61569418668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124694 (or 124692 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 60.

The spelling of 61569418668 in words is "sixty-one billion, five hundred sixty-nine million, four hundred eighteen thousand, six hundred sixty-eight".