16987046640 has 80 divisors (see below), whose sum is σ = 52801302048. Its totient is φ = 4517710848.

The previous prime is 16987046639. The next prime is 16987046693. The reversal of 16987046640 is 4664078961.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×16987046640³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5359 + ... + 184398.

Almost surely, 2^16987046640 is an apocalyptic number.

16987046640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16987046640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26400651024).

16987046640 is an abundant number, since it is smaller than the sum of its proper divisors (35814255408).

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

16987046640 is a wasteful number, since it uses less digits than its factorization.

16987046640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190146 (or 190140 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 16987046640 in words is "sixteen billion, nine hundred eighty-seven million, forty-six thousand, six hundred forty".