77738538847 has 8 divisors (see below), whose sum is σ = 77944377600. Its totient is φ = 77532837720.

The previous prime is 77738538841. The next prime is 77738538851. The reversal of 77738538847 is 74883583777.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77738538847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77738538841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1150404 + ... + 1216102.

It is an arithmetic number, because the mean of its divisors is an integer number (9743047200).

Almost surely, 2^77738538847 is an apocalyptic number.

77738538847 is a deficient number, since it is larger than the sum of its proper divisors (205838753).

77738538847 is a wasteful number, since it uses less digits than its factorization.

77738538847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68813.

The product of its digits is 221276160, while the sum is 67.

The spelling of 77738538847 in words is "seventy-seven billion, seven hundred thirty-eight million, five hundred thirty-eight thousand, eight hundred forty-seven".