156166215251 has 16 divisors (see below), whose sum is σ = 158833902240. Its totient is φ = 153524428800.

The previous prime is 156166215217. The next prime is 156166215259. The reversal of 156166215251 is 152512661651.

156166215251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156166215251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 156166215199 and 156166215208.

It is not an unprimeable number, because it can be changed into a prime (156166215259) 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 15 ways as a sum of consecutive naturals, for example, 8218880 + ... + 8237858.

It is an arithmetic number, because the mean of its divisors is an integer number (9927118890).

Almost surely, 2^156166215251 is an apocalyptic number.

156166215251 is a deficient number, since it is larger than the sum of its proper divisors (2667686989).

156166215251 is a wasteful number, since it uses less digits than its factorization.

156166215251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19654.

The product of its digits is 108000, while the sum is 41.

The spelling of 156166215251 in words is "one hundred fifty-six billion, one hundred sixty-six million, two hundred fifteen thousand, two hundred fifty-one".