641245464 has 48 divisors (see below), whose sum is σ = 1782271800. Its totient is φ = 213624432.

The previous prime is 641245411. The next prime is 641245469. The reversal of 641245464 is 464542146.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

641245464 is a `hidden beast` number, since 641 + 2 + 4 + 5 + 4 + 6 + 4 = 666.

It is a super-2 number, since 2×641245464² = 822391490201150592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641245469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 371307 + ... + 373029.

Almost surely, 2^641245464 is an apocalyptic number.

It is an amenable number.

641245464 is an abundant number, since it is smaller than the sum of its proper divisors (1141026336).

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

641245464 is an equidigital number, since it uses as much as digits as its factorization.

641245464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461 (or 1728 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 641245464 is about 25322.8249608925. The cubic root of 641245464 is about 862.3325285428.

The spelling of 641245464 in words is "six hundred forty-one million, two hundred forty-five thousand, four hundred sixty-four".