16542045378 has 24 divisors (see below), whose sum is σ = 35843582268. Its totient is φ = 5513632992.

The previous prime is 16542045367. The next prime is 16542045379. The reversal of 16542045378 is 87354024561.

It can be written as a sum of positive squares in 2 ways, for example, as 16133318289 + 408727089 = 127017^2 + 20217^2 .

It is a super-2 number, since 2×16542045378² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16542045379) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 376876 + ... + 418472.

Almost surely, 2^16542045378 is an apocalyptic number.

16542045378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16542045378 is an abundant number, since it is smaller than the sum of its proper divisors (19301536890).

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

16542045378 is a wasteful number, since it uses less digits than its factorization.

16542045378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63698 (or 63695 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 16542045378 in words is "sixteen billion, five hundred forty-two million, forty-five thousand, three hundred seventy-eight".