621650244123 has 72 divisors (see below), whose sum is σ = 960852406800. Its totient is φ = 387209051136.

The previous prime is 621650244101. The next prime is 621650244139. The reversal of 621650244123 is 321442056126.

621650244123 is a `hidden beast` number, since 6 + 21 + 6 + 502 + 4 + 4 + 123 = 666.

It is not a de Polignac number, because 621650244123 - 2⁹ = 621650243611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (621650244143) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 231698340 + ... + 231701022.

Almost surely, 2^621650244123 is an apocalyptic number.

621650244123 is a deficient number, since it is larger than the sum of its proper divisors (339202162677).

621650244123 is a wasteful number, since it uses less digits than its factorization.

621650244123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3341 (or 3321 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 621650244123 in words is "six hundred twenty-one billion, six hundred fifty million, two hundred forty-four thousand, one hundred twenty-three".