76940929649 has 2 divisors, whose sum is σ = 76940929650. Its totient is φ = 76940929648.

The previous prime is 76940929631. The next prime is 76940929669. The reversal of 76940929649 is 94692904967.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76095981025 + 844948624 = 275855^2 + 29068^2 .

It is a cyclic number.

It is not a de Polignac number, because 76940929649 - 2¹² = 76940925553 is a prime.

It is not a weakly prime, because it can be changed into another prime (76940929669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38470464824 + 38470464825.

It is an arithmetic number, because the mean of its divisors is an integer number (38470464825).

Almost surely, 2^76940929649 is an apocalyptic number.

It is an amenable number.

76940929649 is a deficient number, since it is larger than the sum of its proper divisors (1).

76940929649 is an equidigital number, since it uses as much as digits as its factorization.

76940929649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52907904, while the sum is 65.

The spelling of 76940929649 in words is "seventy-six billion, nine hundred forty million, nine hundred twenty-nine thousand, six hundred forty-nine".