75991956 has 12 divisors (see below), whose sum is σ = 177314592. Its totient is φ = 25330648.

The previous prime is 75991907. The next prime is 75991957. The reversal of 75991956 is 65919957.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 75991899 and 75991908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75991957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3166320 + ... + 3166343.

It is an arithmetic number, because the mean of its divisors is an integer number (14776216).

Almost surely, 2^75991956 is an apocalyptic number.

It is an amenable number.

75991956 is an abundant number, since it is smaller than the sum of its proper divisors (101322636).

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

75991956 is a wasteful number, since it uses less digits than its factorization.

75991956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6332670 (or 6332668 counting only the distinct ones).

The product of its digits is 765450, while the sum is 51.

The square root of 75991956 is about 8717.3365198322. The cubic root of 75991956 is about 423.5674136154.

The spelling of 75991956 in words is "seventy-five million, nine hundred ninety-one thousand, nine hundred fifty-six".