76987609049489 has 2 divisors, whose sum is σ = 76987609049490. Its totient is φ = 76987609049488.

The previous prime is 76987609049431. The next prime is 76987609049513. The reversal of 76987609049489 is 98494090678967.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52407580318864 + 24580028730625 = 7239308^2 + 4957825^2 .

It is a cyclic number.

It is not a de Polignac number, because 76987609049489 - 2¹² = 76987609045393 is a prime.

It is a super-2 number, since 2×76987609049489² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 76987609049489.

It is not a weakly prime, because it can be changed into another prime (76987609049419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38493804524744 + 38493804524745.

It is an arithmetic number, because the mean of its divisors is an integer number (38493804524745).

Almost surely, 2^{76987609049489} is an apocalyptic number.

It is an amenable number.

76987609049489 is a deficient number, since it is larger than the sum of its proper divisors (1).

76987609049489 is an equidigital number, since it uses as much as digits as its factorization.

76987609049489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11851370496, while the sum is 86.

The spelling of 76987609049489 in words is "seventy-six trillion, nine hundred eighty-seven billion, six hundred nine million, forty-nine thousand, four hundred eighty-nine".