61791648271 has 2 divisors, whose sum is σ = 61791648272. Its totient is φ = 61791648270.

The previous prime is 61791648251. The next prime is 61791648283. The reversal of 61791648271 is 17284619716.

It is a happy number.

61791648271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61791648271 - 2²⁹ = 61254777359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61791648251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30895824135 + 30895824136.

It is an arithmetic number, because the mean of its divisors is an integer number (30895824136).

Almost surely, 2^61791648271 is an apocalyptic number.

61791648271 is a deficient number, since it is larger than the sum of its proper divisors (1).

61791648271 is an equidigital number, since it uses as much as digits as its factorization.

61791648271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 52.

The spelling of 61791648271 in words is "sixty-one billion, seven hundred ninety-one million, six hundred forty-eight thousand, two hundred seventy-one".