35662745221 has 4 divisors (see below), whose sum is σ = 35758356172. Its totient is φ = 35567134272.

The previous prime is 35662745213. The next prime is 35662745227. The reversal of 35662745221 is 12254726653.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30471542721 + 5191202500 = 174561^2 + 72050^2 .

It is a cyclic number.

It is not a de Polignac number, because 35662745221 - 2³ = 35662745213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (35662745227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47804916 + ... + 47805661.

It is an arithmetic number, because the mean of its divisors is an integer number (8939589043).

Almost surely, 2^35662745221 is an apocalyptic number.

It is an amenable number.

35662745221 is a deficient number, since it is larger than the sum of its proper divisors (95610951).

35662745221 is an equidigital number, since it uses as much as digits as its factorization.

35662745221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95610950.

The product of its digits is 604800, while the sum is 43.

The spelling of 35662745221 in words is "thirty-five billion, six hundred sixty-two million, seven hundred forty-five thousand, two hundred twenty-one".