78378940122 has 32 divisors (see below), whose sum is σ = 179190730752. Its totient is φ = 22389124464.

The previous prime is 78378940097. The next prime is 78378940127. The reversal of 78378940122 is 22104987387.

It is a super-2 number, since 2×78378940122² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78378940127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4258 + ... + 395949.

It is an arithmetic number, because the mean of its divisors is an integer number (5599710336).

Almost surely, 2^78378940122 is an apocalyptic number.

78378940122 is an abundant number, since it is smaller than the sum of its proper divisors (100811790630).

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

78378940122 is a wasteful number, since it uses less digits than its factorization.

78378940122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404882.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 78378940122 in words is "seventy-eight billion, three hundred seventy-eight million, nine hundred forty thousand, one hundred twenty-two".