13998251487654 has 128 divisors (see below), whose sum is σ = 37099615887360. Its totient is φ = 3825320320800.

The previous prime is 13998251487587. The next prime is 13998251487673. The reversal of 13998251487654 is 45678415289931.

13998251487654 is a `hidden beast` number, since 1 + 3 + 9 + 9 + 82 + 5 + 1 + 487 + 65 + 4 = 666.

It is a super-2 number, since 2×13998251487654² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 131495709 + ... + 131602119.

It is an arithmetic number, because the mean of its divisors is an integer number (289840749120).

Almost surely, 2^{13998251487654} is an apocalyptic number.

13998251487654 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13998251487654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18549807943680).

13998251487654 is an abundant number, since it is smaller than the sum of its proper divisors (23101364399706).

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

13998251487654 is a wasteful number, since it uses less digits than its factorization.

13998251487654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121583 (or 121577 counting only the distinct ones).

The product of its digits is 522547200, while the sum is 72.

The spelling of 13998251487654 in words is "thirteen trillion, nine hundred ninety-eight billion, two hundred fifty-one million, four hundred eighty-seven thousand, six hundred fifty-four".