74860078639 has 2 divisors, whose sum is σ = 74860078640. Its totient is φ = 74860078638.

The previous prime is 74860078607. The next prime is 74860078661. The reversal of 74860078639 is 93687006847.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74860078639 - 2⁵ = 74860078607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74860078039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37430039319 + 37430039320.

It is an arithmetic number, because the mean of its divisors is an integer number (37430039320).

Almost surely, 2^74860078639 is an apocalyptic number.

74860078639 is a deficient number, since it is larger than the sum of its proper divisors (1).

74860078639 is an equidigital number, since it uses as much as digits as its factorization.

74860078639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12192768, while the sum is 58.

The spelling of 74860078639 in words is "seventy-four billion, eight hundred sixty million, seventy-eight thousand, six hundred thirty-nine".