74278649972993 has 2 divisors, whose sum is σ = 74278649972994. Its totient is φ = 74278649972992.

The previous prime is 74278649972963. The next prime is 74278649973029. The reversal of 74278649972993 is 39927994687247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42341153112064 + 31937496860929 = 6507008^2 + 5651327^2 .

It is a cyclic number.

It is not a de Polignac number, because 74278649972993 - 2²⁸ = 74278381537537 is a prime.

It is not a weakly prime, because it can be changed into another prime (74278649972963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37139324986496 + 37139324986497.

It is an arithmetic number, because the mean of its divisors is an integer number (37139324986497).

Almost surely, 2^{74278649972993} is an apocalyptic number.

It is an amenable number.

74278649972993 is a deficient number, since it is larger than the sum of its proper divisors (1).

74278649972993 is an equidigital number, since it uses as much as digits as its factorization.

74278649972993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20739898368, while the sum is 86.

The spelling of 74278649972993 in words is "seventy-four trillion, two hundred seventy-eight billion, six hundred forty-nine million, nine hundred seventy-two thousand, nine hundred ninety-three".