74485961257 has 4 divisors (see below), whose sum is σ = 75322882260. Its totient is φ = 73649040256.

The previous prime is 74485961243. The next prime is 74485961273. The reversal of 74485961257 is 75216958447.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31762724841 + 42723236416 = 178221^2 + 206696^2 .

It is a cyclic number.

It is not a de Polignac number, because 74485961257 - 2¹¹ = 74485959209 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74485901257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 418460368 + ... + 418460545.

It is an arithmetic number, because the mean of its divisors is an integer number (18830720565).

Almost surely, 2^74485961257 is an apocalyptic number.

It is an amenable number.

74485961257 is a deficient number, since it is larger than the sum of its proper divisors (836921003).

74485961257 is an equidigital number, since it uses as much as digits as its factorization.

74485961257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836921002.

The product of its digits is 16934400, while the sum is 58.

The spelling of 74485961257 in words is "seventy-four billion, four hundred eighty-five million, nine hundred sixty-one thousand, two hundred fifty-seven".