121560026644 has 24 divisors (see below), whose sum is σ = 245851744320. Its totient is φ = 51511791936.

The previous prime is 121560026591. The next prime is 121560026669. The reversal of 121560026644 is 446620065121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24387562 + ... + 24392545.

It is an arithmetic number, because the mean of its divisors is an integer number (10243822680).

Almost surely, 2^121560026644 is an apocalyptic number.

121560026644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121560026644 is an abundant number, since it is smaller than the sum of its proper divisors (124291717676).

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

121560026644 is a wasteful number, since it uses less digits than its factorization.

121560026644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48780207 (or 48780205 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 121560026644 in words is "one hundred twenty-one billion, five hundred sixty million, twenty-six thousand, six hundred forty-four".