74781434562997 has 2 divisors, whose sum is σ = 74781434562998. Its totient is φ = 74781434562996.

The previous prime is 74781434562983. The next prime is 74781434563067. The reversal of 74781434562997 is 79926543418747.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61498077569041 + 13283356993956 = 7842071^2 + 3644634^2 .

It is a cyclic number.

It is not a de Polignac number, because 74781434562997 - 2³⁵ = 74747074824629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74781434565997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37390717281498 + 37390717281499.

It is an arithmetic number, because the mean of its divisors is an integer number (37390717281499).

Almost surely, 2^{74781434562997} is an apocalyptic number.

It is an amenable number.

74781434562997 is a deficient number, since it is larger than the sum of its proper divisors (1).

74781434562997 is an equidigital number, since it uses as much as digits as its factorization.

74781434562997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2560481280, while the sum is 76.

The spelling of 74781434562997 in words is "seventy-four trillion, seven hundred eighty-one billion, four hundred thirty-four million, five hundred sixty-two thousand, nine hundred ninety-seven".