13857497748 has 36 divisors (see below), whose sum is σ = 35375502708. Its totient is φ = 4573430400.

The previous prime is 13857497743. The next prime is 13857497749. The reversal of 13857497748 is 84779475831.

13857497748 is a `hidden beast` number, since 13 + 8 + 574 + 9 + 7 + 7 + 48 = 666.

13857497748 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7586758404 + 6270739344 = 87102^2 + 79188^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13857497743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1901961 + ... + 1909232.

It is an arithmetic number, because the mean of its divisors is an integer number (982652853).

Almost surely, 2^13857497748 is an apocalyptic number.

13857497748 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13857497748 is an abundant number, since it is smaller than the sum of its proper divisors (21518004960).

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

13857497748 is a wasteful number, since it uses less digits than its factorization.

13857497748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3811304 (or 3811299 counting only the distinct ones).

The product of its digits is 47416320, while the sum is 63.

The spelling of 13857497748 in words is "thirteen billion, eight hundred fifty-seven million, four hundred ninety-seven thousand, seven hundred forty-eight".