6181956 has 72 divisors (see below), whose sum is σ = 17375904. Its totient is φ = 1837440.

The previous prime is 6181949. The next prime is 6181969. The reversal of 6181956 is 6591816.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6181956.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26416 + ... + 26648.

It is an arithmetic number, because the mean of its divisors is an integer number (241332).

Almost surely, 2^6181956 is an apocalyptic number.

6181956 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6181956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8687952).

6181956 is an abundant number, since it is smaller than the sum of its proper divisors (11193948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6181956 is a wasteful number, since it uses less digits than its factorization.

6181956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 316 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 6181956 is about 2486.3539571026. The cubic root of 6181956 is about 183.5306642942.

Adding to 6181956 its product of digits (12960), we get a palindrome (6194916).

The spelling of 6181956 in words is "six million, one hundred eighty-one thousand, nine hundred fifty-six".