16540876788 has 72 divisors (see below), whose sum is σ = 41392274112. Its totient is φ = 5131247616.

The previous prime is 16540876633. The next prime is 16540876813. The reversal of 16540876788 is 88767804561.

It is a happy number.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355956 + ... + 399732.

It is an arithmetic number, because the mean of its divisors is an integer number (574892696).

Almost surely, 2^16540876788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16540876788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20696137056).

16540876788 is an abundant number, since it is smaller than the sum of its proper divisors (24851397324).

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

16540876788 is a wasteful number, since it uses less digits than its factorization.

16540876788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43881 (or 43842 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 60.

The spelling of 16540876788 in words is "sixteen billion, five hundred forty million, eight hundred seventy-six thousand, seven hundred eighty-eight".