16550071551 has 40 divisors (see below), whose sum is σ = 26649154224. Its totient is φ = 10175310720.

The previous prime is 16550071513. The next prime is 16550071687. The reversal of 16550071551 is 15517005561.

It is a happy number.

It is not a de Polignac number, because 16550071551 - 2⁷ = 16550071423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16550071051) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1243291 + ... + 1256531.

Almost surely, 2^16550071551 is an apocalyptic number.

16550071551 is a deficient number, since it is larger than the sum of its proper divisors (10099082673).

16550071551 is a wasteful number, since it uses less digits than its factorization.

16550071551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14453 (or 14444 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 36.

The spelling of 16550071551 in words is "sixteen billion, five hundred fifty million, seventy-one thousand, five hundred fifty-one".