75775281123 has 18 divisors (see below), whose sum is σ = 102090304836. Its totient is φ = 49993977672.

The previous prime is 75775281119. The next prime is 75775281173. The reversal of 75775281123 is 32118257757.

It is a happy number.

It is not a de Polignac number, because 75775281123 - 2² = 75775281119 is a prime.

It is a super-2 number, since 2×75775281123² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (75775281173) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 49108290 + ... + 49109832.

It is an arithmetic number, because the mean of its divisors is an integer number (5671683602).

Almost surely, 2^75775281123 is an apocalyptic number.

75775281123 is a deficient number, since it is larger than the sum of its proper divisors (26315023713).

75775281123 is an frugal number, since it uses more digits than its factorization.

75775281123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3295 (or 1649 counting only the distinct ones).

The product of its digits is 823200, while the sum is 48.

Multiplying 75775281123 by its sum of digits (48), we get a square (3637213493904 = 1907148²).

The spelling of 75775281123 in words is "seventy-five billion, seven hundred seventy-five million, two hundred eighty-one thousand, one hundred twenty-three".