61715060191 has 2 divisors, whose sum is σ = 61715060192. Its totient is φ = 61715060190.

The previous prime is 61715060081. The next prime is 61715060243. The reversal of 61715060191 is 19106051716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61715060191 - 2¹⁷ = 61714929119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61715060191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61715060591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30857530095 + 30857530096.

It is an arithmetic number, because the mean of its divisors is an integer number (30857530096).

Almost surely, 2^61715060191 is an apocalyptic number.

61715060191 is a deficient number, since it is larger than the sum of its proper divisors (1).

61715060191 is an equidigital number, since it uses as much as digits as its factorization.

61715060191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 37.

The spelling of 61715060191 in words is "sixty-one billion, seven hundred fifteen million, sixty thousand, one hundred ninety-one".