61565394446 has 36 divisors (see below), whose sum is σ = 96104637216. Its totient is φ = 29577872520.

The previous prime is 61565394431. The next prime is 61565394469. The reversal of 61565394446 is 64449356516.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 162441485 + ... + 162441863.

It is an arithmetic number, because the mean of its divisors is an integer number (2669573256).

Almost surely, 2^61565394446 is an apocalyptic number.

61565394446 is a deficient number, since it is larger than the sum of its proper divisors (34539242770).

61565394446 is an equidigital number, since it uses as much as digits as its factorization.

61565394446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045 (or 635 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 53.

The spelling of 61565394446 in words is "sixty-one billion, five hundred sixty-five million, three hundred ninety-four thousand, four hundred forty-six".