122782498978 has 8 divisors (see below), whose sum is σ = 184181087772. Its totient is φ = 61388803056.

The previous prime is 122782498973. The next prime is 122782498987. The reversal of 122782498978 is 879894287221.

It can be written as a sum of positive squares in 2 ways, for example, as 122194290969 + 588208009 = 349563^2 + 24253^2 .

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

It is not an unprimeable number, because it can be changed into a prime (122782498973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1159825 + ... + 1261252.

Almost surely, 2^122782498978 is an apocalyptic number.

122782498978 is a deficient number, since it is larger than the sum of its proper divisors (61398588794).

122782498978 is a wasteful number, since it uses less digits than its factorization.

122782498978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446436.

The product of its digits is 65028096, while the sum is 67.

The spelling of 122782498978 in words is "one hundred twenty-two billion, seven hundred eighty-two million, four hundred ninety-eight thousand, nine hundred seventy-eight".