641354624 has 32 divisors (see below), whose sum is σ = 1279579800. Its totient is φ = 320205312.

The previous prime is 641354617. The next prime is 641354639. The reversal of 641354624 is 426453146.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×641354624² = 822671507452362752, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93587 + ... + 100205.

Almost surely, 2^641354624 is an apocalyptic number.

641354624 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

641354624 is a deficient number, since it is larger than the sum of its proper divisors (638225176).

641354624 is an equidigital number, since it uses as much as digits as its factorization.

641354624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7390 (or 7378 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

The square root of 641354624 is about 25324.9802369123. The cubic root of 641354624 is about 862.3814577403.

The spelling of 641354624 in words is "six hundred forty-one million, three hundred fifty-four thousand, six hundred twenty-four".