78216556768846 has 32 divisors (see below), whose sum is σ = 119272762224000. Its totient is φ = 38463112396800.

The previous prime is 78216556768837. The next prime is 78216556768859. The reversal of 78216556768846 is 64886765561287.

It is a super-2 number, since 2×78216556768846² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (79).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41718886 + ... + 43553398.

It is an arithmetic number, because the mean of its divisors is an integer number (3727273819500).

Almost surely, 2^{78216556768846} is an apocalyptic number.

78216556768846 is a deficient number, since it is larger than the sum of its proper divisors (41056205455154).

78216556768846 is a wasteful number, since it uses less digits than its factorization.

78216556768846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835644.

The product of its digits is 6502809600, while the sum is 79.

The spelling of 78216556768846 in words is "seventy-eight trillion, two hundred sixteen billion, five hundred fifty-six million, seven hundred sixty-eight thousand, eight hundred forty-six".