11641645 has 8 divisors (see below), whose sum is σ = 14127480. Its totient is φ = 9208320.

The previous prime is 11641639. The next prime is 11641681. The reversal of 11641645 is 54614611.

11641645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6724 + 11634921 = 82^2 + 3411^2 .

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

It is not a de Polignac number, because 11641645 - 2⁵ = 11641613 is a prime.

It is a super-3 number, since 3×11641645³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12636 + ... + 13525.

It is an arithmetic number, because the mean of its divisors is an integer number (1765935).

Almost surely, 2^11641645 is an apocalyptic number.

It is an amenable number.

11641645 is a deficient number, since it is larger than the sum of its proper divisors (2485835).

11641645 is an equidigital number, since it uses as much as digits as its factorization.

11641645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26255.

The product of its digits is 2880, while the sum is 28.

The square root of 11641645 is about 3411.9854923490. The cubic root of 11641645 is about 226.6408118818.

It can be divided in two parts, 1164 and 1645, that added together give a square (2809 = 53²).

The spelling of 11641645 in words is "eleven million, six hundred forty-one thousand, six hundred forty-five".