74561031481 has 8 divisors (see below), whose sum is σ = 77253864264. Its totient is φ = 71903865600.

The previous prime is 74561031473. The next prime is 74561031487. The reversal of 74561031481 is 18413016547.

It can be written as a sum of positive squares in 4 ways, for example, as 22722849081 + 51838182400 = 150741^2 + 227680^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74561031481 - 2³ = 74561031473 is a prime.

It is a super-2 number, since 2×74561031481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74561031487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8912470 + ... + 8920831.

It is an arithmetic number, because the mean of its divisors is an integer number (9656733033).

Almost surely, 2^74561031481 is an apocalyptic number.

It is an amenable number.

74561031481 is a deficient number, since it is larger than the sum of its proper divisors (2692832783).

74561031481 is a wasteful number, since it uses less digits than its factorization.

74561031481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17833451.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 74561031481 in words is "seventy-four billion, five hundred sixty-one million, thirty-one thousand, four hundred eighty-one".