61641568192 has 14 divisors (see below), whose sum is σ = 122319987008. Its totient is φ = 30820784064.

The previous prime is 61641568189. The next prime is 61641568199. The reversal of 61641568192 is 29186514616.

It is a happy number.

It is a super-2 number, since 2×61641568192² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61641568199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 481574688 + ... + 481574815.

Almost surely, 2^61641568192 is an apocalyptic number.

It is an amenable number.

61641568192 is a deficient number, since it is larger than the sum of its proper divisors (60678418816).

61641568192 is an equidigital number, since it uses as much as digits as its factorization.

61641568192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963149515 (or 963149505 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The spelling of 61641568192 in words is "sixty-one billion, six hundred forty-one million, five hundred sixty-eight thousand, one hundred ninety-two".