120531654643620 has 144 divisors (see below), whose sum is σ = 371378711471040. Its totient is φ = 29186702012160.

The previous prime is 120531654643619. The next prime is 120531654643633. The reversal of 120531654643620 is 26346456135021.

It is a super-2 number, since 2×120531654643620² (a number of 29 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 120531654643620.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2990415 + ... + 15811574.

It is an arithmetic number, because the mean of its divisors is an integer number (2579018829660).

Almost surely, 2^{120531654643620} is an apocalyptic number.

120531654643620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120531654643620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185689355735520).

120531654643620 is an abundant number, since it is smaller than the sum of its proper divisors (250847056827420).

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

120531654643620 is a wasteful number, since it uses less digits than its factorization.

120531654643620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18802906 (or 18802893 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 120531654643620 in words is "one hundred twenty trillion, five hundred thirty-one billion, six hundred fifty-four million, six hundred forty-three thousand, six hundred twenty".