78374411994 has 16 divisors (see below), whose sum is σ = 156780277632. Its totient is φ = 26119561728.

The previous prime is 78374411939. The next prime is 78374412091. The reversal of 78374411994 is 49911447387.

It is a happy number.

It is a super-2 number, since 2×78374411994² (a number of 23 digits) contains 22 as substring.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 1278114 + ... + 1338029.

It is an arithmetic number, because the mean of its divisors is an integer number (9798767352).

Almost surely, 2^78374411994 is an apocalyptic number.

78374411994 is an abundant number, since it is smaller than the sum of its proper divisors (78405865638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78374411994 is a wasteful number, since it uses less digits than its factorization.

78374411994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621141.

The product of its digits is 6096384, while the sum is 57.

The spelling of 78374411994 in words is "seventy-eight billion, three hundred seventy-four million, four hundred eleven thousand, nine hundred ninety-four".