74626947749 has 2 divisors, whose sum is σ = 74626947750. Its totient is φ = 74626947748.

The previous prime is 74626947671. The next prime is 74626947779. The reversal of 74626947749 is 94774962647.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43017663649 + 31609284100 = 207407^2 + 177790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74626947749 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74626947779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37313473874 + 37313473875.

It is an arithmetic number, because the mean of its divisors is an integer number (37313473875).

Almost surely, 2^74626947749 is an apocalyptic number.

It is an amenable number.

74626947749 is a deficient number, since it is larger than the sum of its proper divisors (1).

74626947749 is an equidigital number, since it uses as much as digits as its factorization.

74626947749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128024064, while the sum is 65.

The spelling of 74626947749 in words is "seventy-four billion, six hundred twenty-six million, nine hundred forty-seven thousand, seven hundred forty-nine".