74847690817 has 2 divisors, whose sum is σ = 74847690818. Its totient is φ = 74847690816.

The previous prime is 74847690791. The next prime is 74847690851. The reversal of 74847690817 is 71809674847.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58266235456 + 16581455361 = 241384^2 + 128769^2 .

It is a cyclic number.

It is not a de Polignac number, because 74847690817 - 2⁷ = 74847690689 is a prime.

It is a super-2 number, since 2×74847690817² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74847690887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37423845408 + 37423845409.

It is an arithmetic number, because the mean of its divisors is an integer number (37423845409).

Almost surely, 2^74847690817 is an apocalyptic number.

It is an amenable number.

74847690817 is a deficient number, since it is larger than the sum of its proper divisors (1).

74847690817 is an equidigital number, since it uses as much as digits as its factorization.

74847690817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18966528, while the sum is 61.

The spelling of 74847690817 in words is "seventy-four billion, eight hundred forty-seven million, six hundred ninety thousand, eight hundred seventeen".