13573552640 has 40 divisors (see below), whose sum is σ = 32544719460. Its totient is φ = 5429420032.

The previous prime is 13573552639. The next prime is 13573552661. The reversal of 13573552640 is 4625537531.

It can be written as a sum of positive squares in 2 ways, for example, as 13444866304 + 128686336 = 115952^2 + 11344^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2648525 + ... + 2653644.

Almost surely, 2^13573552640 is an apocalyptic number.

13573552640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13573552640 is an abundant number, since it is smaller than the sum of its proper divisors (18971166820).

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

13573552640 is an frugal number, since it uses more digits than its factorization.

13573552640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5302192 (or 5302176 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 41.

The spelling of 13573552640 in words is "thirteen billion, five hundred seventy-three million, five hundred fifty-two thousand, six hundred forty".