16201170556551 has 12 divisors (see below), whose sum is σ = 23558749133400. Its totient is φ = 10728291911280.

The previous prime is 16201170556541. The next prime is 16201170556577. The reversal of 16201170556551 is 15565507110261.

16201170556551 is a `hidden beast` number, since 1 + 6 + 2 + 0 + 11 + 70 + 5 + 565 + 5 + 1 = 666.

It is not a de Polignac number, because 16201170556551 - 2²³ = 16201162167943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16201170556497 and 16201170556506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16201170556541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6040703565 + ... + 6040706246.

It is an arithmetic number, because the mean of its divisors is an integer number (1963229094450).

Almost surely, 2^{16201170556551} is an apocalyptic number.

16201170556551 is a deficient number, since it is larger than the sum of its proper divisors (7357578576849).

16201170556551 is a wasteful number, since it uses less digits than its factorization.

16201170556551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12081409966 (or 12081409963 counting only the distinct ones).

The product of its (nonzero) digits is 315000, while the sum is 45.

The spelling of 16201170556551 in words is "sixteen trillion, two hundred one billion, one hundred seventy million, five hundred fifty-six thousand, five hundred fifty-one".