77399897836 has 24 divisors (see below), whose sum is σ = 135825711840. Its totient is φ = 38592615552.

The previous prime is 77399897833. The next prime is 77399897863. The reversal of 77399897836 is 63879899377.

It is not an unprimeable number, because it can be changed into a prime (77399897831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6755865 + ... + 6767311.

It is an arithmetic number, because the mean of its divisors is an integer number (5659404660).

Almost surely, 2^77399897836 is an apocalyptic number.

It is an amenable number.

77399897836 is a deficient number, since it is larger than the sum of its proper divisors (58425814004).

77399897836 is a wasteful number, since it uses less digits than its factorization.

77399897836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15993 (or 15991 counting only the distinct ones).

The product of its digits is 864162432, while the sum is 76.

The spelling of 77399897836 in words is "seventy-seven billion, three hundred ninety-nine million, eight hundred ninety-seven thousand, eight hundred thirty-six".