641902253 has 8 divisors (see below), whose sum is σ = 650939520. Its totient is φ = 632914560.

The previous prime is 641902249. The next prime is 641902271. The reversal of 641902253 is 352209146.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641902253 - 2² = 641902249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641952253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14078 + ... + 38496.

It is an arithmetic number, because the mean of its divisors is an integer number (81367440).

Almost surely, 2^641902253 is an apocalyptic number.

It is an amenable number.

641902253 is a deficient number, since it is larger than the sum of its proper divisors (9037267).

641902253 is a wasteful number, since it uses less digits than its factorization.

641902253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24787.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 641902253 is about 25335.7899620280. The cubic root of 641902253 is about 862.6268397931.

The spelling of 641902253 in words is "six hundred forty-one million, nine hundred two thousand, two hundred fifty-three".