77936245738 has 8 divisors (see below), whose sum is σ = 125897012388. Its totient is φ = 35970574944.

The previous prime is 77936245687. The next prime is 77936245769. The reversal of 77936245738 is 83754263977.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 74334205449 + 3602040289 = 272643^2 + 60017^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1498773931 + ... + 1498773982.

Almost surely, 2^77936245738 is an apocalyptic number.

77936245738 is a deficient number, since it is larger than the sum of its proper divisors (47960766650).

77936245738 is a wasteful number, since it uses less digits than its factorization.

77936245738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997547928.

The product of its digits is 53343360, while the sum is 61.

The spelling of 77936245738 in words is "seventy-seven billion, nine hundred thirty-six million, two hundred forty-five thousand, seven hundred thirty-eight".