74697809481 has 81 divisors (see below), whose sum is σ = 120333515029. Its totient is φ = 44639012352.

The previous prime is 74697809449. The next prime is 74697809489. The reversal of 74697809481 is 18490879647.

The square root of 74697809481 is 273309.

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

74697809481 is a `hidden beast` number, since 7 + 469 + 7 + 8 + 0 + 94 + 81 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 37711881 + 74660097600 = 6141^2 + 273240^2 .

It is not a de Polignac number, because 74697809481 - 2⁵ = 74697809449 is a prime.

It is a super-2 number, since 2×74697809481² (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 (74697809489) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 320591341 + ... + 320591573.

Almost surely, 2^74697809481 is an apocalyptic number.

74697809481 is the 273309-th square number.

74697809481 is the 136655-th centered octagonal number.

It is an amenable number.

74697809481 is a deficient number, since it is larger than the sum of its proper divisors (45635705548).

74697809481 is a wasteful number, since it uses less digits than its factorization.

74697809481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 63.

The spelling of 74697809481 in words is "seventy-four billion, six hundred ninety-seven million, eight hundred nine thousand, four hundred eighty-one".