77249894291 has 2 divisors, whose sum is σ = 77249894292. Its totient is φ = 77249894290.

The previous prime is 77249894261. The next prime is 77249894321. The reversal of 77249894291 is 19249894277.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (77249894261) and next prime (77249894321).

It is a cyclic number.

It is not a de Polignac number, because 77249894291 - 2³⁴ = 60070025107 is a prime.

It is not a weakly prime, because it can be changed into another prime (77249894221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38624947145 + 38624947146.

It is an arithmetic number, because the mean of its divisors is an integer number (38624947146).

Almost surely, 2^77249894291 is an apocalyptic number.

77249894291 is a deficient number, since it is larger than the sum of its proper divisors (1).

77249894291 is an equidigital number, since it uses as much as digits as its factorization.

77249894291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 62.

The spelling of 77249894291 in words is "seventy-seven billion, two hundred forty-nine million, eight hundred ninety-four thousand, two hundred ninety-one".