15854871368141 has 4 divisors (see below), whose sum is σ = 17074476858012. Its totient is φ = 14635265878272.

The previous prime is 15854871368123. The next prime is 15854871368143. The reversal of 15854871368141 is 14186317845851.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 994848651241 + 14860022716900 = 997421^2 + 3854870^2 .

It is a de Polignac number, because none of the positive numbers 2^k-15854871368141 is a prime.

It is a super-2 number, since 2×15854871368141² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15854871368143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609802744916 + ... + 609802744941.

It is an arithmetic number, because the mean of its divisors is an integer number (4268619214503).

Almost surely, 2^{15854871368141} is an apocalyptic number.

It is an amenable number.

15854871368141 is a deficient number, since it is larger than the sum of its proper divisors (1219605489871).

15854871368141 is a wasteful number, since it uses less digits than its factorization.

15854871368141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219605489870.

The product of its digits is 25804800, while the sum is 62.

The spelling of 15854871368141 in words is "fifteen trillion, eight hundred fifty-four billion, eight hundred seventy-one million, three hundred sixty-eight thousand, one hundred forty-one".