78244632481816 has 16 divisors (see below), whose sum is σ = 146709492256440. Its totient is φ = 39122101213440.

The previous prime is 78244632481793. The next prime is 78244632481831. The reversal of 78244632481816 is 61818423644287.

It is a super-2 number, since 2×78244632481816² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

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, 25326666 + ... + 28247641.

Almost surely, 2^{78244632481816} is an apocalyptic number.

It is an amenable number.

78244632481816 is a deficient number, since it is larger than the sum of its proper divisors (68464859774624).

78244632481816 is a wasteful number, since it uses less digits than its factorization.

78244632481816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53756874 (or 53756870 counting only the distinct ones).

The product of its digits is 99090432, while the sum is 64.

The spelling of 78244632481816 in words is "seventy-eight trillion, two hundred forty-four billion, six hundred thirty-two million, four hundred eighty-one thousand, eight hundred sixteen".