75688193881 has 2 divisors, whose sum is σ = 75688193882. Its totient is φ = 75688193880.

The previous prime is 75688193879. The next prime is 75688193921. The reversal of 75688193881 is 18839188657.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72406737225 + 3281456656 = 269085^2 + 57284^2 .

It is a cyclic number.

It is not a de Polignac number, because 75688193881 - 2¹ = 75688193879 is a prime.

It is a super-2 number, since 2×75688193881² (a number of 23 digits) contains 22 as substring.

Together with 75688193879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (75688193081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37844096940 + 37844096941.

It is an arithmetic number, because the mean of its divisors is an integer number (37844096941).

Almost surely, 2^75688193881 is an apocalyptic number.

It is an amenable number.

75688193881 is a deficient number, since it is larger than the sum of its proper divisors (1).

75688193881 is an equidigital number, since it uses as much as digits as its factorization.

75688193881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23224320, while the sum is 64.

The spelling of 75688193881 in words is "seventy-five billion, six hundred eighty-eight million, one hundred ninety-three thousand, eight hundred eighty-one".