75357988081 has 4 divisors (see below), whose sum is σ = 79324198000. Its totient is φ = 71391778164.

The previous prime is 75357988073. The next prime is 75357988087. The reversal of 75357988081 is 18088975357.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18088975357 = 1423 ⋅12711859.

It is a cyclic number.

It is not a de Polignac number, because 75357988081 - 2³ = 75357988073 is a prime.

It is a super-2 number, since 2×75357988081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75357988087) 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, 1983104931 + ... + 1983104968.

It is an arithmetic number, because the mean of its divisors is an integer number (19831049500).

Almost surely, 2^75357988081 is an apocalyptic number.

It is an amenable number.

75357988081 is a deficient number, since it is larger than the sum of its proper divisors (3966209919).

75357988081 is a wasteful number, since it uses less digits than its factorization.

75357988081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3966209918.

The product of its (nonzero) digits is 16934400, while the sum is 61.

The spelling of 75357988081 in words is "seventy-five billion, three hundred fifty-seven million, nine hundred eighty-eight thousand, eighty-one".