74047691551 has 2 divisors, whose sum is σ = 74047691552. Its totient is φ = 74047691550.

The previous prime is 74047691539. The next prime is 74047691567. The reversal of 74047691551 is 15519674047.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74047691551 - 2²³ = 74039302943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74047691495 and 74047691504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74047691591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37023845775 + 37023845776.

It is an arithmetic number, because the mean of its divisors is an integer number (37023845776).

Almost surely, 2^74047691551 is an apocalyptic number.

74047691551 is a deficient number, since it is larger than the sum of its proper divisors (1).

74047691551 is an equidigital number, since it uses as much as digits as its factorization.

74047691551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 74047691551 in words is "seventy-four billion, forty-seven million, six hundred ninety-one thousand, five hundred fifty-one".