621403234540010 has 64 divisors (see below), whose sum is σ = 1276564943620512. Its totient is φ = 215751327031296.

The previous prime is 621403234540007. The next prime is 621403234540031. The reversal of 621403234540010 is 10045432304126.

It can be written as a sum of positive squares in 16 ways, for example, as 7411282082689 + 613991952457321 = 2722367^2 + 24778861^2 .

It is a super-2 number, since 2×621403234540010² (a number of 30 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123394427 + ... + 128331566.

Almost surely, 2^{621403234540010} is an apocalyptic number.

621403234540010 is an abundant number, since it is smaller than the sum of its proper divisors (655161709080502).

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

621403234540010 is a wasteful number, since it uses less digits than its factorization.

621403234540010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251727147.

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 621403234540010 its reverse (10045432304126), we get a palindrome (631448666844136).

The spelling of 621403234540010 in words is "six hundred twenty-one trillion, four hundred three billion, two hundred thirty-four million, five hundred forty thousand, ten".