15681541442856 has 32 divisors (see below), whose sum is σ = 40468494048000. Its totient is φ = 5058561755520.

The previous prime is 15681541442789. The next prime is 15681541442923. The reversal of 15681541442856 is 65824414518651.

It is an interprime number because it is at equal distance from previous prime (15681541442789) and next prime (15681541442923).

It is a self number, because there is not a number n which added to its sum of digits gives 15681541442856.

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, 10538669581 + ... + 10538671068.

It is an arithmetic number, because the mean of its divisors is an integer number (1264640439000).

Almost surely, 2^{15681541442856} is an apocalyptic number.

It is an amenable number.

15681541442856 is an abundant number, since it is smaller than the sum of its proper divisors (24786952605144).

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

15681541442856 is a wasteful number, since it uses less digits than its factorization.

15681541442856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21077340689 (or 21077340685 counting only the distinct ones).

The product of its digits is 36864000, while the sum is 60.

The spelling of 15681541442856 in words is "fifteen trillion, six hundred eighty-one billion, five hundred forty-one million, four hundred forty-two thousand, eight hundred fifty-six".