74937481493 has 12 divisors (see below), whose sum is σ = 87187499820. Its totient is φ = 64220833152.

The previous prime is 74937481477. The next prime is 74937481501. The reversal of 74937481493 is 39418473947.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52478562724 + 22458918769 = 229082^2 + 149863^2 .

It is not a de Polignac number, because 74937481493 - 2⁴ = 74937481477 is a prime.

It is a super-2 number, since 2×74937481493² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74937481693) 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 in 11 ways as a sum of consecutive naturals, for example, 153293 + ... + 416381.

It is an arithmetic number, because the mean of its divisors is an integer number (7265624985).

Almost surely, 2^74937481493 is an apocalyptic number.

It is an amenable number.

74937481493 is a deficient number, since it is larger than the sum of its proper divisors (12250018327).

74937481493 is a wasteful number, since it uses less digits than its factorization.

74937481493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268916 (or 268909 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 59.

The spelling of 74937481493 in words is "seventy-four billion, nine hundred thirty-seven million, four hundred eighty-one thousand, four hundred ninety-three".