641815453011 has 16 divisors (see below), whose sum is σ = 867977670816. Its totient is φ = 421771873536.

The previous prime is 641815453007. The next prime is 641815453079. The reversal of 641815453011 is 110354518146.

It is not a de Polignac number, because 641815453011 - 2² = 641815453007 is a prime.

It is a super-2 number, since 2×641815453011² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641815452011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466020 + ... + 1225073.

It is an arithmetic number, because the mean of its divisors is an integer number (54248604426).

Almost surely, 2^641815453011 is an apocalyptic number.

641815453011 is a deficient number, since it is larger than the sum of its proper divisors (226162217805).

641815453011 is a wasteful number, since it uses less digits than its factorization.

641815453011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692902.

The product of its (nonzero) digits is 57600, while the sum is 39.

The spelling of 641815453011 in words is "six hundred forty-one billion, eight hundred fifteen million, four hundred fifty-three thousand, eleven".