77474136248 has 16 divisors (see below), whose sum is σ = 145270920480. Its totient is φ = 38735224128.

The previous prime is 77474136247. The next prime is 77474136277. The reversal of 77474136248 is 84263147477.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 77474136248.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42965 + ... + 395972.

It is an arithmetic number, because the mean of its divisors is an integer number (9079432530).

Almost surely, 2^77474136248 is an apocalyptic number.

It is an amenable number.

77474136248 is a deficient number, since it is larger than the sum of its proper divisors (67796784232).

77474136248 is a wasteful number, since it uses less digits than its factorization.

77474136248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461006 (or 461002 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 53.

The spelling of 77474136248 in words is "seventy-seven billion, four hundred seventy-four million, one hundred thirty-six thousand, two hundred forty-eight".