122636447290 has 128 divisors (see below), whose sum is σ = 265245580800. Its totient is φ = 39938088960.

The previous prime is 122636447279. The next prime is 122636447291. The reversal of 122636447290 is 92744636221.

It is a self number, because there is not a number n which added to its sum of digits gives 122636447290.

It is not an unprimeable number, because it can be changed into a prime (122636447291) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38119762 + ... + 38122978.

It is an arithmetic number, because the mean of its divisors is an integer number (2072231100).

Almost surely, 2^122636447290 is an apocalyptic number.

122636447290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122636447290 is an abundant number, since it is smaller than the sum of its proper divisors (142609133510).

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

122636447290 is a wasteful number, since it uses less digits than its factorization.

122636447290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560.

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 122636447290 in words is "one hundred twenty-two billion, six hundred thirty-six million, four hundred forty-seven thousand, two hundred ninety".