16257122287 has 16 divisors (see below), whose sum is σ = 19739668032. Its totient is φ = 13070200320.

The previous prime is 16257122237. The next prime is 16257122291. The reversal of 16257122287 is 78222175261.

It is a cyclic number.

It is not a de Polignac number, because 16257122287 - 2⁷ = 16257122159 is a prime.

It is a super-2 number, since 2×16257122287² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16257122227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198264 + ... + 267997.

It is an arithmetic number, because the mean of its divisors is an integer number (1233729252).

Almost surely, 2^16257122287 is an apocalyptic number.

16257122287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

16257122287 is a deficient number, since it is larger than the sum of its proper divisors (3482545745).

16257122287 is a wasteful number, since it uses less digits than its factorization.

16257122287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466578.

The product of its digits is 188160, while the sum is 43.

The spelling of 16257122287 in words is "sixteen billion, two hundred fifty-seven million, one hundred twenty-two thousand, two hundred eighty-seven".