621621145332 has 144 divisors (see below), whose sum is σ = 1780642543680. Its totient is φ = 181119052800.

The previous prime is 621621145331. The next prime is 621621145357. The reversal of 621621145332 is 233541126126.

621621145332 is a `hidden beast` number, since 6 + 2 + 1 + 6 + 2 + 114 + 533 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621621145331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2655343 + ... + 2879945.

It is an arithmetic number, because the mean of its divisors is an integer number (12365573220).

Almost surely, 2^621621145332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621621145332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (890321271840).

621621145332 is an abundant number, since it is smaller than the sum of its proper divisors (1159021398348).

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

621621145332 is a wasteful number, since it uses less digits than its factorization.

621621145332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224894 (or 224889 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The spelling of 621621145332 in words is "six hundred twenty-one billion, six hundred twenty-one million, one hundred forty-five thousand, three hundred thirty-two".