74234996557 has 2 divisors, whose sum is σ = 74234996558. Its totient is φ = 74234996556.

The previous prime is 74234996513. The next prime is 74234996573. The reversal of 74234996557 is 75569943247.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74234996521 + 36 = 272461^2 + 6^2 .

It is an emirp because it is prime and its reverse (75569943247) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74234996557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74234996495 and 74234996504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74234996597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37117498278 + 37117498279.

It is an arithmetic number, because the mean of its divisors is an integer number (37117498279).

Almost surely, 2^74234996557 is an apocalyptic number.

It is an amenable number.

74234996557 is a deficient number, since it is larger than the sum of its proper divisors (1).

74234996557 is an equidigital number, since it uses as much as digits as its factorization.

74234996557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57153600, while the sum is 61.

The spelling of 74234996557 in words is "seventy-four billion, two hundred thirty-four million, nine hundred ninety-six thousand, five hundred fifty-seven".