2211604164640 has 48 divisors (see below), whose sum is σ = 5626831370328. Its totient is φ = 816592306176.

The previous prime is 2211604164619. The next prime is 2211604164773. The reversal of 2211604164640 is 464614061122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1607184991504 + 604419173136 = 1267748^2 + 777444^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2211604164640.

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, 531633537 + ... + 531637696.

Almost surely, 2^{2211604164640} is an apocalyptic number.

2211604164640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211604164640 is an abundant number, since it is smaller than the sum of its proper divisors (3415227205688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2211604164640 is a wasteful number, since it uses less digits than its factorization.

2211604164640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063271261 (or 1063271253 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 2211604164640 in words is "two trillion, two hundred eleven billion, six hundred four million, one hundred sixty-four thousand, six hundred forty".