641450623 has 16 divisors (see below), whose sum is σ = 725254560. Its totient is φ = 561971200.

The previous prime is 641450603. The next prime is 641450627. The reversal of 641450623 is 326054146.

It is a cyclic number.

It is not a de Polignac number, because 641450623 - 2⁵ = 641450591 is a prime.

It is a super-2 number, since 2×641450623² = 822917803494176258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641450627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202911 + ... + 206047.

It is an arithmetic number, because the mean of its divisors is an integer number (45328410).

Almost surely, 2^641450623 is an apocalyptic number.

641450623 is a deficient number, since it is larger than the sum of its proper divisors (83803937).

641450623 is a wasteful number, since it uses less digits than its factorization.

641450623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 641450623 is about 25326.8755080448. The cubic root of 641450623 is about 862.4244831453.

The spelling of 641450623 in words is "six hundred forty-one million, four hundred fifty thousand, six hundred twenty-three".