75985181811 has 64 divisors (see below), whose sum is σ = 146449981440. Its totient is φ = 37756588320.

The previous prime is 75985181791. The next prime is 75985181821. The reversal of 75985181811 is 11818158957.

It is a happy number.

It is not a de Polignac number, because 75985181811 - 2¹³ = 75985173619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75985181821) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 746725 + ... + 842358.

It is an arithmetic number, because the mean of its divisors is an integer number (2288280960).

Almost surely, 2^75985181811 is an apocalyptic number.

75985181811 is a deficient number, since it is larger than the sum of its proper divisors (70464799629).

75985181811 is a wasteful number, since it uses less digits than its factorization.

75985181811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589133 (or 1589127 counting only the distinct ones).

The product of its digits is 806400, while the sum is 54.

The spelling of 75985181811 in words is "seventy-five billion, nine hundred eighty-five million, one hundred eighty-one thousand, eight hundred eleven".