621234040032 has 72 divisors (see below), whose sum is σ = 1767871745640. Its totient is φ = 206932965120.

The previous prime is 621234040013. The next prime is 621234040081. The reversal of 621234040032 is 230040432126.

621234040032 is a `hidden beast` number, since 6 + 21 + 234 + 0 + 400 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×621234040032² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 621234039978 and 621234040005.

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 11 ways as a sum of consecutive naturals, for example, 343194 + ... + 1166297.

It is an arithmetic number, because the mean of its divisors is an integer number (24553774245).

Almost surely, 2^621234040032 is an apocalyptic number.

It is an amenable number.

621234040032 is an abundant number, since it is smaller than the sum of its proper divisors (1146637705608).

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

621234040032 is a wasteful number, since it uses less digits than its factorization.

621234040032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510936 (or 1510925 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 621234040032 its reverse (230040432126), we get a palindrome (851274472158).

The spelling of 621234040032 in words is "six hundred twenty-one billion, two hundred thirty-four million, forty thousand, thirty-two".