74883916781 has 2 divisors, whose sum is σ = 74883916782. Its totient is φ = 74883916780.

The previous prime is 74883916769. The next prime is 74883916813. The reversal of 74883916781 is 18761938847.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45695902756 + 29188014025 = 213766^2 + 170845^2 .

It is an emirp because it is prime and its reverse (18761938847) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74883916781 is a prime.

It is a super-2 number, since 2×74883916781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74883916181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37441958390 + 37441958391.

It is an arithmetic number, because the mean of its divisors is an integer number (37441958391).

Almost surely, 2^74883916781 is an apocalyptic number.

It is an amenable number.

74883916781 is a deficient number, since it is larger than the sum of its proper divisors (1).

74883916781 is an equidigital number, since it uses as much as digits as its factorization.

74883916781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16257024, while the sum is 62.

The spelling of 74883916781 in words is "seventy-four billion, eight hundred eighty-three million, nine hundred sixteen thousand, seven hundred eighty-one".