158166201555 has 40 divisors (see below), whose sum is σ = 283636200672. Its totient is φ = 84322985472.

The previous prime is 158166201547. The next prime is 158166201559. The reversal of 158166201555 is 555102661851.

158166201555 is a `hidden beast` number, since 1 + 5 + 8 + 1 + 6 + 620 + 15 + 5 + 5 = 666.

158166201555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 158166201555 - 2³ = 158166201547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 158166201555.

It is not an unprimeable number, because it can be changed into a prime (158166201559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1002594 + ... + 1149576.

Almost surely, 2^158166201555 is an apocalyptic number.

158166201555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

158166201555 is a deficient number, since it is larger than the sum of its proper divisors (125469999117).

158166201555 is a wasteful number, since it uses less digits than its factorization.

158166201555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149657 (or 149648 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 45.

The spelling of 158166201555 in words is "one hundred fifty-eight billion, one hundred sixty-six million, two hundred one thousand, five hundred fifty-five".