13893249640 has 32 divisors (see below), whose sum is σ = 31277923560. Its totient is φ = 5554080000.

The previous prime is 13893249637. The next prime is 13893249707. The reversal of 13893249640 is 4694239831.

It can be written as a sum of positive squares in 4 ways, for example, as 1955939076 + 11937310564 = 44226^2 + 109258^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

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, 30111 + ... + 169390.

Almost surely, 2^13893249640 is an apocalyptic number.

13893249640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13893249640 is an abundant number, since it is smaller than the sum of its proper divisors (17384673920).

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

13893249640 is a wasteful number, since it uses less digits than its factorization.

13893249640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201253 (or 201249 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

The spelling of 13893249640 in words is "thirteen billion, eight hundred ninety-three million, two hundred forty-nine thousand, six hundred forty".