74715851447 has 2 divisors, whose sum is σ = 74715851448. Its totient is φ = 74715851446.

The previous prime is 74715851381. The next prime is 74715851473. The reversal of 74715851447 is 74415851747.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74715851447 - 2⁸ = 74715851191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74715851477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37357925723 + 37357925724.

It is an arithmetic number, because the mean of its divisors is an integer number (37357925724).

Almost surely, 2^74715851447 is an apocalyptic number.

74715851447 is a deficient number, since it is larger than the sum of its proper divisors (1).

74715851447 is an equidigital number, since it uses as much as digits as its factorization.

74715851447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4390400, while the sum is 53.

The spelling of 74715851447 in words is "seventy-four billion, seven hundred fifteen million, eight hundred fifty-one thousand, four hundred forty-seven".