52166006215551 has 24 divisors (see below), whose sum is σ = 75680446464480. Its totient is φ = 34625504742336.

The previous prime is 52166006215537. The next prime is 52166006215571. The reversal of 52166006215551 is 15551260066125.

It is a happy number.

52166006215551 is a `hidden beast` number, since 5 + 2 + 16 + 6 + 0 + 0 + 621 + 5 + 5 + 5 + 1 = 666.

It is not a de Polignac number, because 52166006215551 - 2²¹ = 52166004118399 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52166006215497 and 52166006215506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52166006215571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8760496 + ... + 13456533.

It is an arithmetic number, because the mean of its divisors is an integer number (3153351936020).

Almost surely, 2^{52166006215551} is an apocalyptic number.

52166006215551 is a deficient number, since it is larger than the sum of its proper divisors (23514440248929).

52166006215551 is a wasteful number, since it uses less digits than its factorization.

52166006215551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22218175 (or 22218172 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 45.

The spelling of 52166006215551 in words is "fifty-two trillion, one hundred sixty-six billion, six million, two hundred fifteen thousand, five hundred fifty-one".