61791648272 has 20 divisors (see below), whose sum is σ = 119725826640. Its totient is φ = 30894660768.

The previous prime is 61791648271. The next prime is 61791648283. The reversal of 61791648272 is 27284619716.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (61791648271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504179 + ... + 614637.

It is an arithmetic number, because the mean of its divisors is an integer number (5986291332).

Almost surely, 2^61791648272 is an apocalyptic number.

It is an amenable number.

61791648272 is a deficient number, since it is larger than the sum of its proper divisors (57934178368).

61791648272 is a wasteful number, since it uses less digits than its factorization.

61791648272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145430 (or 145424 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 53.

The spelling of 61791648272 in words is "sixty-one billion, seven hundred ninety-one million, six hundred forty-eight thousand, two hundred seventy-two".