621758032132 has 12 divisors (see below), whose sum is σ = 1114615009116. Its totient is φ = 303296600960.

The previous prime is 621758032121. The next prime is 621758032139. The reversal of 621758032132 is 231230857126.

It can be written as a sum of positive squares in 2 ways, for example, as 318712186116 + 303045846016 = 564546^2 + 550496^2 .

It is not an unprimeable number, because it can be changed into a prime (621758032139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1895603593 + ... + 1895603920.

It is an arithmetic number, because the mean of its divisors is an integer number (92884584093).

Almost surely, 2^621758032132 is an apocalyptic number.

It is an amenable number.

621758032132 is a deficient number, since it is larger than the sum of its proper divisors (492856976984).

621758032132 is a wasteful number, since it uses less digits than its factorization.

621758032132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791207558 (or 3791207556 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

Adding to 621758032132 its reverse (231230857126), we get a palindrome (852988889258).

The spelling of 621758032132 in words is "six hundred twenty-one billion, seven hundred fifty-eight million, thirty-two thousand, one hundred thirty-two".