74715198617 has 2 divisors, whose sum is σ = 74715198618. Its totient is φ = 74715198616.

The previous prime is 74715198487. The next prime is 74715198659. The reversal of 74715198617 is 71689151747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74570501776 + 144696841 = 273076^2 + 12029^2 .

It is a cyclic number.

It is not a de Polignac number, because 74715198617 - 2¹⁸ = 74714936473 is a prime.

It is a super-3 number, since 3×74715198617³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (74715198697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37357599308 + 37357599309.

It is an arithmetic number, because the mean of its divisors is an integer number (37357599309).

Almost surely, 2^74715198617 is an apocalyptic number.

It is an amenable number.

74715198617 is a deficient number, since it is larger than the sum of its proper divisors (1).

74715198617 is an equidigital number, since it uses as much as digits as its factorization.

74715198617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 56.

The spelling of 74715198617 in words is "seventy-four billion, seven hundred fifteen million, one hundred ninety-eight thousand, six hundred seventeen".