74777481 has 24 divisors (see below), whose sum is σ = 113657544. Its totient is φ = 47312640.

The previous prime is 74777467. The next prime is 74777497. The reversal of 74777481 is 18477747.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 32319225 + 42458256 = 5685^2 + 6516^2 .

It is not a de Polignac number, because 74777481 - 2⁹ = 74776969 is a prime.

It is a super-2 number, since 2×74777481² = 11183343329410722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74777281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10915 + ... + 16391.

It is an arithmetic number, because the mean of its divisors is an integer number (4735731).

Almost surely, 2^74777481 is an apocalyptic number.

It is an amenable number.

74777481 is a deficient number, since it is larger than the sum of its proper divisors (38880063).

74777481 is a wasteful number, since it uses less digits than its factorization.

74777481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561 (or 5558 counting only the distinct ones).

The product of its digits is 307328, while the sum is 45.

The square root of 74777481 is about 8647.3973541176. The cubic root of 74777481 is about 421.2988532951.

The spelling of 74777481 in words is "seventy-four million, seven hundred seventy-seven thousand, four hundred eighty-one".