16003261287 has 160 divisors (see below), whose sum is σ = 29084977152. Its totient is φ = 8666735616.

The previous prime is 16003261277. The next prime is 16003261297. The reversal of 16003261287 is 78216230061.

16003261287 is a `hidden beast` number, since 1 + 6 + 0 + 0 + 32 + 612 + 8 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (16003261277) and next prime (16003261297).

It is not a de Polignac number, because 16003261287 - 2⁷ = 16003261159 is a prime.

It is a super-2 number, since 2×16003261287² (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 (16003261207) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 19350568 + ... + 19351394.

Almost surely, 2^16003261287 is an apocalyptic number.

16003261287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

16003261287 is a deficient number, since it is larger than the sum of its proper divisors (13081715865).

16003261287 is a wasteful number, since it uses less digits than its factorization.

16003261287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

It can be divided in two parts, 1600326 and 1287, that added together give a cube (1601613 = 117³).

The spelling of 16003261287 in words is "sixteen billion, three million, two hundred sixty-one thousand, two hundred eighty-seven".