13765512997 has 2 divisors, whose sum is σ = 13765512998. Its totient is φ = 13765512996.

The previous prime is 13765512991. The next prime is 13765513001. The reversal of 13765512997 is 79921556731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11537767396 + 2227745601 = 107414^2 + 47199^2 .

It is a cyclic number.

It is not a de Polignac number, because 13765512997 - 2¹¹ = 13765510949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13765512991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6882756498 + 6882756499.

It is an arithmetic number, because the mean of its divisors is an integer number (6882756499).

Almost surely, 2^13765512997 is an apocalyptic number.

It is an amenable number.

13765512997 is a deficient number, since it is larger than the sum of its proper divisors (1).

13765512997 is an equidigital number, since it uses as much as digits as its factorization.

13765512997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3572100, while the sum is 55.

The spelling of 13765512997 in words is "thirteen billion, seven hundred sixty-five million, five hundred twelve thousand, nine hundred ninety-seven".