77474136249 has 12 divisors (see below), whose sum is σ = 111922367700. Its totient is φ = 51642370944.

The previous prime is 77474136247. The next prime is 77474136277. The reversal of 77474136249 is 94263147477.

It is a happy number.

77474136249 is a `hidden beast` number, since 7 + 7 + 4 + 7 + 4 + 1 + 3 + 624 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 72950228649 + 4523907600 = 270093^2 + 67260^2 .

It is not a de Polignac number, because 77474136249 - 2¹ = 77474136247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77474136195 and 77474136204.

It is not an unprimeable number, because it can be changed into a prime (77474136247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 517764 + ... + 650405.

It is an arithmetic number, because the mean of its divisors is an integer number (9326863975).

Almost surely, 2^77474136249 is an apocalyptic number.

It is an amenable number.

77474136249 is a deficient number, since it is larger than the sum of its proper divisors (34448231451).

77474136249 is a wasteful number, since it uses less digits than its factorization.

77474136249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175544 (or 1175541 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 54.

The spelling of 77474136249 in words is "seventy-seven billion, four hundred seventy-four million, one hundred thirty-six thousand, two hundred forty-nine".