74572248761 has 2 divisors, whose sum is σ = 74572248762. Its totient is φ = 74572248760.

The previous prime is 74572248719. The next prime is 74572248763. The reversal of 74572248761 is 16784227547.

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., 74130408361 + 441840400 = 272269^2 + 21020^2 .

It is a cyclic number.

It is not a de Polignac number, because 74572248761 - 2¹⁸ = 74571986617 is a prime.

It is a super-2 number, since 2×74572248761² (a number of 23 digits) contains 22 as substring.

Together with 74572248763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74572248763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37286124380 + 37286124381.

It is an arithmetic number, because the mean of its divisors is an integer number (37286124381).

Almost surely, 2^74572248761 is an apocalyptic number.

It is an amenable number.

74572248761 is a deficient number, since it is larger than the sum of its proper divisors (1).

74572248761 is an equidigital number, since it uses as much as digits as its factorization.

74572248761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5268480, while the sum is 53.

The spelling of 74572248761 in words is "seventy-four billion, five hundred seventy-two million, two hundred forty-eight thousand, seven hundred sixty-one".