81762763792739 has 2 divisors, whose sum is σ = 81762763792740. Its totient is φ = 81762763792738.

The previous prime is 81762763792603. The next prime is 81762763792753. The reversal of 81762763792739 is 93729736726718.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81762763792739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81762763792739.

It is not a weakly prime, because it can be changed into another prime (81762763752739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40881381896369 + 40881381896370.

It is an arithmetic number, because the mean of its divisors is an integer number (40881381896370).

Almost surely, 2^{81762763792739} is an apocalyptic number.

81762763792739 is a deficient number, since it is larger than the sum of its proper divisors (1).

81762763792739 is an equidigital number, since it uses as much as digits as its factorization.

81762763792739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016379008, while the sum is 77.

The spelling of 81762763792739 in words is "eighty-one trillion, seven hundred sixty-two billion, seven hundred sixty-three million, seven hundred ninety-two thousand, seven hundred thirty-nine".