13971061856784 has 40 divisors (see below), whose sum is σ = 36241668788512. Its totient is φ = 4637696878080.

The previous prime is 13971061856771. The next prime is 13971061856789. The reversal of 13971061856784 is 48765816017931.

It is a super-3 number, since 3×13971061856784³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (13971061856789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603855214 + ... + 603878349.

Almost surely, 2^{13971061856784} is an apocalyptic number.

It is an amenable number.

13971061856784 is an abundant number, since it is smaller than the sum of its proper divisors (22270606931728).

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

13971061856784 is a wasteful number, since it uses less digits than its factorization.

13971061856784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207733815 (or 1207733809 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 66.

The spelling of 13971061856784 in words is "thirteen trillion, nine hundred seventy-one billion, sixty-one million, eight hundred fifty-six thousand, seven hundred eighty-four".