16237887681 has 8 divisors (see below), whose sum is σ = 22178578464. Its totient is φ = 10561227680.

The previous prime is 16237887649. The next prime is 16237887697. The reversal of 16237887681 is 18678873261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16237887681 - 2⁵ = 16237887649 is a prime.

It is a super-2 number, since 2×16237887681² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16237887581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66007551 + ... + 66007796.

It is an arithmetic number, because the mean of its divisors is an integer number (2772322308).

Almost surely, 2^16237887681 is an apocalyptic number.

It is an amenable number.

16237887681 is a deficient number, since it is larger than the sum of its proper divisors (5940690783).

16237887681 is a wasteful number, since it uses less digits than its factorization.

16237887681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132015391.

The product of its digits is 5419008, while the sum is 57.

The spelling of 16237887681 in words is "sixteen billion, two hundred thirty-seven million, eight hundred eighty-seven thousand, six hundred eighty-one".