6181226158 has 4 divisors (see below), whose sum is σ = 9271839240. Its totient is φ = 3090613078.

The previous prime is 6181226153. The next prime is 6181226171. The reversal of 6181226158 is 8516221816.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 6181226158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6181226153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1545306538 + ... + 1545306541.

It is an arithmetic number, because the mean of its divisors is an integer number (2317959810).

Almost surely, 2^6181226158 is an apocalyptic number.

6181226158 is a deficient number, since it is larger than the sum of its proper divisors (3090613082).

6181226158 is a wasteful number, since it uses less digits than its factorization.

6181226158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090613081.

The product of its digits is 46080, while the sum is 40.

The square root of 6181226158 is about 78620.7743411371. The cubic root of 6181226158 is about 1835.2344146378.

The spelling of 6181226158 in words is "six billion, one hundred eighty-one million, two hundred twenty-six thousand, one hundred fifty-eight".