621240789120 has 128 divisors (see below), whose sum is σ = 2263091495040. Its totient is φ = 141997891584.

The previous prime is 621240789101. The next prime is 621240789149. The reversal of 621240789120 is 21987042126.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23098197 + ... + 23125076.

It is an arithmetic number, because the mean of its divisors is an integer number (17680402305).

Almost surely, 2^621240789120 is an apocalyptic number.

621240789120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

621240789120 is an abundant number, since it is smaller than the sum of its proper divisors (1641850705920).

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

621240789120 is a wasteful number, since it uses less digits than its factorization.

621240789120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46223302 (or 46223290 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

It can be divided in two parts, 621240 and 789120, that added together give a triangular number (1410360 = T₁₆₇₉).

The spelling of 621240789120 in words is "six hundred twenty-one billion, two hundred forty million, seven hundred eighty-nine thousand, one hundred twenty".