74868143957 has 2 divisors, whose sum is σ = 74868143958. Its totient is φ = 74868143956.

The previous prime is 74868143923. The next prime is 74868144059. The reversal of 74868143957 is 75934186847.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65897970436 + 8970173521 = 256706^2 + 94711^2 .

It is an emirp because it is prime and its reverse (75934186847) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74868143957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74868143957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74868143257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37434071978 + 37434071979.

It is an arithmetic number, because the mean of its divisors is an integer number (37434071979).

Almost surely, 2^74868143957 is an apocalyptic number.

It is an amenable number.

74868143957 is a deficient number, since it is larger than the sum of its proper divisors (1).

74868143957 is an equidigital number, since it uses as much as digits as its factorization.

74868143957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40642560, while the sum is 62.

The spelling of 74868143957 in words is "seventy-four billion, eight hundred sixty-eight million, one hundred forty-three thousand, nine hundred fifty-seven".