16243240686387 has 64 divisors (see below), whose sum is σ = 26066276554752. Its totient is φ = 8864900352000.

The previous prime is 16243240686371. The next prime is 16243240686419. The reversal of 16243240686387 is 78368604234261.

It is not a de Polignac number, because 16243240686387 - 2⁴ = 16243240686371 is a prime.

It is a super-2 number, since 2×16243240686387² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16243240686387.

It is not an unprimeable number, because it can be changed into a prime (16243240686487) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 459987462 + ... + 460022772.

It is an arithmetic number, because the mean of its divisors is an integer number (407285571168).

Almost surely, 2^{16243240686387} is an apocalyptic number.

16243240686387 is a deficient number, since it is larger than the sum of its proper divisors (9823035868365).

16243240686387 is a wasteful number, since it uses less digits than its factorization.

16243240686387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61532.

The product of its (nonzero) digits is 55738368, while the sum is 60.

The spelling of 16243240686387 in words is "sixteen trillion, two hundred forty-three billion, two hundred forty million, six hundred eighty-six thousand, three hundred eighty-seven".