72561172552751 has 2 divisors, whose sum is σ = 72561172552752. Its totient is φ = 72561172552750.

The previous prime is 72561172552703. The next prime is 72561172552793. The reversal of 72561172552751 is 15725527116527.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72561172552751 - 2¹⁰ = 72561172551727 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72561172552051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36280586276375 + 36280586276376.

It is an arithmetic number, because the mean of its divisors is an integer number (36280586276376).

Almost surely, 2^{72561172552751} is an apocalyptic number.

72561172552751 is a deficient number, since it is larger than the sum of its proper divisors (1).

72561172552751 is an equidigital number, since it uses as much as digits as its factorization.

72561172552751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10290000, while the sum is 56.

The spelling of 72561172552751 in words is "seventy-two trillion, five hundred sixty-one billion, one hundred seventy-two million, five hundred fifty-two thousand, seven hundred fifty-one".