641347651 has 8 divisors (see below), whose sum is σ = 743909120. Its totient is φ = 541521288.

The previous prime is 641347649. The next prime is 641347691. The reversal of 641347651 is 156743146.

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

It is not a de Polignac number, because 641347651 - 2¹ = 641347649 is a prime.

It is a super-2 number, since 2×641347651² = 822653618886435602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641347651.

It is not an unprimeable number, because it can be changed into a prime (641347601) 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, 683271 + ... + 684208.

It is an arithmetic number, because the mean of its divisors is an integer number (92988640).

Almost surely, 2^641347651 is an apocalyptic number.

641347651 is a deficient number, since it is larger than the sum of its proper divisors (102561469).

641347651 is a wasteful number, since it uses less digits than its factorization.

641347651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367553.

The product of its digits is 60480, while the sum is 37.

The square root of 641347651 is about 25324.8425661444. The cubic root of 641347651 is about 862.3783323723.

The spelling of 641347651 in words is "six hundred forty-one million, three hundred forty-seven thousand, six hundred fifty-one".