77986429838 has 8 divisors (see below), whose sum is σ = 117585757488. Its totient is φ = 38791177344.

The previous prime is 77986429837. The next prime is 77986429847. The reversal of 77986429838 is 83892468977.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77986429837) 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, 101018306 + ... + 101019077.

It is an arithmetic number, because the mean of its divisors is an integer number (14698219686).

Almost surely, 2^77986429838 is an apocalyptic number.

77986429838 is a deficient number, since it is larger than the sum of its proper divisors (39599327650).

77986429838 is a wasteful number, since it uses less digits than its factorization.

77986429838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202037578.

The product of its digits is 292626432, while the sum is 71.

The spelling of 77986429838 in words is "seventy-seven billion, nine hundred eighty-six million, four hundred twenty-nine thousand, eight hundred thirty-eight".