13640403652 has 12 divisors (see below), whose sum is σ = 24452919036. Its totient is φ = 6653855360.

The previous prime is 13640403641. The next prime is 13640403661. The reversal of 13640403652 is 25630404631.

It can be written as a sum of positive squares in 2 ways, for example, as 2647719936 + 10992683716 = 51456^2 + 104846^2 .

It is a super-2 number, since 2×13640403652² (a number of 21 digits) contains 22 as substring.

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, 41586433 + ... + 41586760.

It is an arithmetic number, because the mean of its divisors is an integer number (2037743253).

Almost surely, 2^13640403652 is an apocalyptic number.

It is an amenable number.

13640403652 is a deficient number, since it is larger than the sum of its proper divisors (10812515384).

13640403652 is a wasteful number, since it uses less digits than its factorization.

13640403652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83173238 (or 83173236 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 13640403652 in words is "thirteen billion, six hundred forty million, four hundred three thousand, six hundred fifty-two".