158191601236 has 24 divisors (see below), whose sum is σ = 293163675840. Its totient is φ = 74431946112.

The previous prime is 158191601213. The next prime is 158191601257. The reversal of 158191601236 is 632106191851.

It is a junction number, because it is equal to n+sod(n) for n = 158191601192 and 158191601201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291625 + ... + 633583.

It is an arithmetic number, because the mean of its divisors is an integer number (12215153160).

Almost surely, 2^158191601236 is an apocalyptic number.

It is an amenable number.

158191601236 is a deficient number, since it is larger than the sum of its proper divisors (134972074604).

158191601236 is a wasteful number, since it uses less digits than its factorization.

158191601236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348783 (or 348781 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 158191601236 in words is "one hundred fifty-eight billion, one hundred ninety-one million, six hundred one thousand, two hundred thirty-six".