158156686651851 has 24 divisors (see below), whose sum is σ = 229857663771840. Its totient is φ = 104787472423536.

The previous prime is 158156686651841. The next prime is 158156686651867.

It is a happy number.

158156686651851 is a `hidden beast` number, since 1 + 5 + 8 + 1 + 56 + 6 + 8 + 6 + 6 + 518 + 51 = 666.

158156686651851 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 158156686651851 - 2¹¹ = 158156686649803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 158156686651851.

It is not an unprimeable number, because it can be changed into a prime (158156686651841) 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, 43035600 + ... + 46565826.

It is an arithmetic number, because the mean of its divisors is an integer number (9577402657160).

Almost surely, 2^{158156686651851} is an apocalyptic number.

158156686651851 is a deficient number, since it is larger than the sum of its proper divisors (71700977119989).

158156686651851 is a wasteful number, since it uses less digits than its factorization.

158156686651851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3560935 (or 3560932 counting only the distinct ones).

The product of its digits is 414720000, while the sum is 72.

The spelling of 158156686651851 in words is "one hundred fifty-eight trillion, one hundred fifty-six billion, six hundred eighty-six million, six hundred fifty-one thousand, eight hundred fifty-one".