78394374862 has 32 divisors (see below), whose sum is σ = 123702681600. Its totient is φ = 37211152800.

The previous prime is 78394374859. The next prime is 78394374869. The reversal of 78394374862 is 26847349387.

It is a happy number.

It is a super-2 number, since 2×78394374862² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78394374862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78394374869) 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 15 ways as a sum of consecutive naturals, for example, 1729812 + ... + 1774552.

It is an arithmetic number, because the mean of its divisors is an integer number (3865708800).

Almost surely, 2^78394374862 is an apocalyptic number.

78394374862 is a deficient number, since it is larger than the sum of its proper divisors (45308306738).

78394374862 is a wasteful number, since it uses less digits than its factorization.

78394374862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45312.

The product of its digits is 48771072, while the sum is 61.

The spelling of 78394374862 in words is "seventy-eight billion, three hundred ninety-four million, three hundred seventy-four thousand, eight hundred sixty-two".