78121436074 has 8 divisors (see below), whose sum is σ = 127835077248. Its totient is φ = 35509743660.

The previous prime is 78121436033. The next prime is 78121436101. The reversal of 78121436074 is 47063412187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78121436074² (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 78121436074.

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, 1775487162 + ... + 1775487205.

It is an arithmetic number, because the mean of its divisors is an integer number (15979384656).

Almost surely, 2^78121436074 is an apocalyptic number.

78121436074 is a deficient number, since it is larger than the sum of its proper divisors (49713641174).

78121436074 is a wasteful number, since it uses less digits than its factorization.

78121436074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550974380.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 78121436074 in words is "seventy-eight billion, one hundred twenty-one million, four hundred thirty-six thousand, seventy-four".