73978016122 has 4 divisors (see below), whose sum is σ = 110967024186. Its totient is φ = 36989008060.

The previous prime is 73978016107. The next prime is 73978016131. The reversal of 73978016122 is 22161087937.

It is a Cunningham number, because it is equal to 271989²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 73978016121 + 1 = 271989^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18494504029 + ... + 18494504032.

Almost surely, 2^73978016122 is an apocalyptic number.

73978016122 is a deficient number, since it is larger than the sum of its proper divisors (36989008064).

73978016122 is a wasteful number, since it uses less digits than its factorization.

73978016122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36989008063.

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 73978016122 in words is "seventy-three billion, nine hundred seventy-eight million, sixteen thousand, one hundred twenty-two".