71712451501 has 2 divisors, whose sum is σ = 71712451502. Its totient is φ = 71712451500.

The previous prime is 71712451453. The next prime is 71712451513. The reversal of 71712451501 is 10515421717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58782487401 + 12929964100 = 242451^2 + 113710^2 .

It is a cyclic number.

It is not a de Polignac number, because 71712451501 - 2²¹ = 71710354349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71712451561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35856225750 + 35856225751.

It is an arithmetic number, because the mean of its divisors is an integer number (35856225751).

Almost surely, 2^71712451501 is an apocalyptic number.

It is an amenable number.

71712451501 is a deficient number, since it is larger than the sum of its proper divisors (1).

71712451501 is an equidigital number, since it uses as much as digits as its factorization.

71712451501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9800, while the sum is 34.

The spelling of 71712451501 in words is "seventy-one billion, seven hundred twelve million, four hundred fifty-one thousand, five hundred one".