74992846145281 has 27 divisors (see below), whose sum is σ = 76327555625923. Its totient is φ = 73681391164400.

The previous prime is 74992846145279. The next prime is 74992846145297. The reversal of 74992846145281 is 18254164829947.

The square root of 74992846145281 is 8659841.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 72052238512881 + 2940607632400 = 8488359^2 + 1714820^2 .

It is not a de Polignac number, because 74992846145281 - 2¹ = 74992846145279 is a prime.

It is a super-2 number, since 2×74992846145281² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74992846145281.

It is not an unprimeable number, because it can be changed into a prime (74992846145981) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 156561265200 + ... + 156561265678.

Almost surely, 2^{74992846145281} is an apocalyptic number.

74992846145281 is the 8659841-st square number.

74992846145281 is the 4329921-st centered octagonal number.

It is an amenable number.

74992846145281 is a deficient number, since it is larger than the sum of its proper divisors (1334709480642).

74992846145281 is an frugal number, since it uses more digits than its factorization.

74992846145281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518 (or 759 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 70.

The spelling of 74992846145281 in words is "seventy-four trillion, nine hundred ninety-two billion, eight hundred forty-six million, one hundred forty-five thousand, two hundred eighty-one".