77400348336812 has 24 divisors (see below), whose sum is σ = 136154896612896. Its totient is φ = 38498956581888.

The previous prime is 77400348336761. The next prime is 77400348336827. The reversal of 77400348336812 is 21863384300477.

It is a happy number.

It is a super-2 number, since 2×77400348336812² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43040273 + ... + 44802519.

It is an arithmetic number, because the mean of its divisors is an integer number (5673120692204).

Almost surely, 2^{77400348336812} is an apocalyptic number.

It is an amenable number.

77400348336812 is a deficient number, since it is larger than the sum of its proper divisors (58754548276084).

77400348336812 is a wasteful number, since it uses less digits than its factorization.

77400348336812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819337 (or 1819335 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 56.

The spelling of 77400348336812 in words is "seventy-seven trillion, four hundred billion, three hundred forty-eight million, three hundred thirty-six thousand, eight hundred twelve".