74136942977 has 2 divisors, whose sum is σ = 74136942978. Its totient is φ = 74136942976.

The previous prime is 74136942949. The next prime is 74136942991. The reversal of 74136942977 is 77924963147.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74136942961 + 16 = 272281^2 + 4^2 .

It is an emirp because it is prime and its reverse (77924963147) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74136942977 - 2¹⁴ = 74136926593 is a prime.

It is not a weakly prime, because it can be changed into another prime (74136942907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37068471488 + 37068471489.

It is an arithmetic number, because the mean of its divisors is an integer number (37068471489).

Almost surely, 2^74136942977 is an apocalyptic number.

It is an amenable number.

74136942977 is a deficient number, since it is larger than the sum of its proper divisors (1).

74136942977 is an equidigital number, since it uses as much as digits as its factorization.

74136942977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16003008, while the sum is 59.

The spelling of 74136942977 in words is "seventy-four billion, one hundred thirty-six million, nine hundred forty-two thousand, nine hundred seventy-seven".