621499994126 has 16 divisors (see below), whose sum is σ = 1019359634688. Its totient is φ = 281844540600.

The previous prime is 621499994123. The next prime is 621499994131.

621499994126 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621499994123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32763140 + ... + 32782103.

It is an arithmetic number, because the mean of its divisors is an integer number (63709977168).

Almost surely, 2^621499994126 is an apocalyptic number.

621499994126 is a deficient number, since it is larger than the sum of its proper divisors (397859640562).

621499994126 is a wasteful number, since it uses less digits than its factorization.

621499994126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65545687.

The product of its digits is 15116544, while the sum is 62.

The spelling of 621499994126 in words is "six hundred twenty-one billion, four hundred ninety-nine million, nine hundred ninety-four thousand, one hundred twenty-six".