75991955 has 16 divisors (see below), whose sum is σ = 103983264. Its totient is φ = 52815360.

The previous prime is 75991907. The next prime is 75991957. The reversal of 75991955 is 55919957.

It is a happy number.

It is not a de Polignac number, because 75991955 - 2⁶ = 75991891 is a prime.

It is a Duffinian number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33281 + ... + 35490.

It is an arithmetic number, because the mean of its divisors is an integer number (6498954).

Almost surely, 2^75991955 is an apocalyptic number.

75991955 is a deficient number, since it is larger than the sum of its proper divisors (27991309).

75991955 is a wasteful number, since it uses less digits than its factorization.

75991955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68806.

The product of its digits is 637875, while the sum is 50.

The square root of 75991955 is about 8717.3364624752. The cubic root of 75991955 is about 423.5674117574.

The spelling of 75991955 in words is "seventy-five million, nine hundred ninety-one thousand, nine hundred fifty-five".