641463621 has 16 divisors (see below), whose sum is σ = 859590144. Its totient is φ = 425496944.

The previous prime is 641463607. The next prime is 641463623. The reversal of 641463621 is 126364146.

It is a cyclic number.

It is not a de Polignac number, because 641463621 - 2²⁶ = 574354757 is a prime.

It is a super-2 number, since 2×641463621² = 822951154132863282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641463623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 991120 + ... + 991766.

It is an arithmetic number, because the mean of its divisors is an integer number (53724384).

Almost surely, 2^641463621 is an apocalyptic number.

It is an amenable number.

641463621 is a deficient number, since it is larger than the sum of its proper divisors (218126523).

641463621 is a wasteful number, since it uses less digits than its factorization.

641463621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800.

The product of its digits is 20736, while the sum is 33.

The square root of 641463621 is about 25327.1321116308. The cubic root of 641463621 is about 862.4303083366.

The spelling of 641463621 in words is "six hundred forty-one million, four hundred sixty-three thousand, six hundred twenty-one".