641755011 has 16 divisors (see below), whose sum is σ = 869529600. Its totient is φ = 420924768.

The previous prime is 641754989. The next prime is 641755021. The reversal of 641755011 is 110557146.

It is not a de Polignac number, because 641755011 - 2¹⁵ = 641722243 is a prime.

It is a super-2 number, since 2×641755011² = 823698988287220242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641755011.

It is not an unprimeable number, because it can be changed into a prime (641755021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221470 + ... + 224348.

It is an arithmetic number, because the mean of its divisors is an integer number (54345600).

Almost surely, 2^641755011 is an apocalyptic number.

641755011 is a deficient number, since it is larger than the sum of its proper divisors (227774589).

641755011 is a wasteful number, since it uses less digits than its factorization.

641755011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 641755011 is about 25332.8839850499. The cubic root of 641755011 is about 862.5608771985.

The spelling of 641755011 in words is "six hundred forty-one million, seven hundred fifty-five thousand, eleven".