64316712724981 has 2 divisors, whose sum is σ = 64316712724982. Its totient is φ = 64316712724980.

The previous prime is 64316712724969. The next prime is 64316712724987. The reversal of 64316712724981 is 18942721761346.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53302644349956 + 11014068375025 = 7300866^2 + 3318745^2 .

It is a cyclic number.

It is not a de Polignac number, because 64316712724981 - 2⁵ = 64316712724949 is a prime.

It is a super-2 number, since 2×64316712724981² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64316712724987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32158356362490 + 32158356362491.

It is an arithmetic number, because the mean of its divisors is an integer number (32158356362491).

Almost surely, 2^{64316712724981} is an apocalyptic number.

It is an amenable number.

64316712724981 is a deficient number, since it is larger than the sum of its proper divisors (1).

64316712724981 is an equidigital number, since it uses as much as digits as its factorization.

64316712724981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24385536, while the sum is 61.

The spelling of 64316712724981 in words is "sixty-four trillion, three hundred sixteen billion, seven hundred twelve million, seven hundred twenty-four thousand, nine hundred eighty-one".