641151915 has 16 divisors (see below), whose sum is σ = 1026297888. Its totient is φ = 341796096.

The previous prime is 641151899. The next prime is 641151937. The reversal of 641151915 is 519151146.

It is not a de Polignac number, because 641151915 - 2⁴ = 641151899 is a prime.

It is a super-2 number, since 2×641151915² = 822151556216334450, which contains 22 as substring.

It is an unprimeable number.

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, 31089 + ... + 47421.

It is an arithmetic number, because the mean of its divisors is an integer number (64143618).

Almost surely, 2^641151915 is an apocalyptic number.

641151915 is a deficient number, since it is larger than the sum of its proper divisors (385145973).

641151915 is a wasteful number, since it uses less digits than its factorization.

641151915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18958.

The product of its digits is 5400, while the sum is 33.

The square root of 641151915 is about 25320.9777654813. The cubic root of 641151915 is about 862.2905923039.

The spelling of 641151915 in words is "six hundred forty-one million, one hundred fifty-one thousand, nine hundred fifteen".