77344934138 has 8 divisors (see below), whose sum is σ = 116019913332. Its totient is φ = 38671629696.

The previous prime is 77344934137. The next prime is 77344934179. The reversal of 77344934138 is 83143944377.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 77048990929 + 295943209 = 277577^2 + 17203^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 77344934138.

It is not an unprimeable number, because it can be changed into a prime (77344934137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296045 + ... + 492272.

Almost surely, 2^77344934138 is an apocalyptic number.

77344934138 is a deficient number, since it is larger than the sum of its proper divisors (38674979194).

77344934138 is a wasteful number, since it uses less digits than its factorization.

77344934138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837376.

The product of its digits is 6096384, while the sum is 53.

The spelling of 77344934138 in words is "seventy-seven billion, three hundred forty-four million, nine hundred thirty-four thousand, one hundred thirty-eight".