621042240126 has 64 divisors (see below), whose sum is σ = 1639665400320. Its totient is φ = 151820866560.

The previous prime is 621042240089. The next prime is 621042240199.

621042240126 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 621042240093 and 621042240102.

It is a congruent 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, 39528831 + ... + 39544538.

It is an arithmetic number, because the mean of its divisors is an integer number (25619771880).

Almost surely, 2^621042240126 is an apocalyptic number.

621042240126 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

621042240126 is an abundant number, since it is smaller than the sum of its proper divisors (1018623160194).

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

621042240126 is a wasteful number, since it uses less digits than its factorization.

621042240126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79073409.

The product of its (nonzero) digits is 9216, while the sum is 30.

It can be divided in two parts, 621042 and 240126, that added together give a palindrome (861168).

The spelling of 621042240126 in words is "six hundred twenty-one billion, forty-two million, two hundred forty thousand, one hundred twenty-six".