61072724591 has 2 divisors, whose sum is σ = 61072724592. Its totient is φ = 61072724590.

The previous prime is 61072724543. The next prime is 61072724593. The reversal of 61072724591 is 19542727016.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61072724591 is a prime.

It is a super-2 number, since 2×61072724591² (a number of 22 digits) contains 22 as substring.

Together with 61072724593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61072724593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30536362295 + 30536362296.

It is an arithmetic number, because the mean of its divisors is an integer number (30536362296).

Almost surely, 2^61072724591 is an apocalyptic number.

61072724591 is a deficient number, since it is larger than the sum of its proper divisors (1).

61072724591 is an equidigital number, since it uses as much as digits as its factorization.

61072724591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 61072724591 in words is "sixty-one billion, seventy-two million, seven hundred twenty-four thousand, five hundred ninety-one".