16542786039381 has 24 divisors (see below), whose sum is σ = 27590259429824. Its totient is φ = 9355566769920.

The previous prime is 16542786039331. The next prime is 16542786039517. The reversal of 16542786039381 is 18393068724561.

16542786039381 is a `hidden beast` number, since 1 + 6 + 5 + 42 + 78 + 60 + 393 + 81 = 666.

It is not a de Polignac number, because 16542786039381 - 2¹⁵ = 16542786006613 is a prime.

It is a super-2 number, since 2×16542786039381² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16542786039331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1353519175 + ... + 1353531396.

It is a 1-persistent number, because it is pandigital, but 2⋅16542786039381 = 33085572078762 is not.

Almost surely, 2^{16542786039381} is an apocalyptic number.

It is an amenable number.

16542786039381 is a deficient number, since it is larger than the sum of its proper divisors (11047473390443).

16542786039381 is a wasteful number, since it uses less digits than its factorization.

16542786039381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707050681 (or 2707050678 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 16542786039381 in words is "sixteen trillion, five hundred forty-two billion, seven hundred eighty-six million, thirty-nine thousand, three hundred eighty-one".