75161220808 has 8 divisors (see below), whose sum is σ = 140927289030. Its totient is φ = 37580610400.

The previous prime is 75161220793. The next prime is 75161220833. The reversal of 75161220808 is 80802216157.

It can be written as a sum of positive squares in only one way, i.e., 73288235524 + 1872985284 = 270718^2 + 43278^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×75161220808² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4697576293 + ... + 4697576308.

Almost surely, 2^75161220808 is an apocalyptic number.

It is an amenable number.

75161220808 is a deficient number, since it is larger than the sum of its proper divisors (65766068222).

75161220808 is a wasteful number, since it uses less digits than its factorization.

75161220808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9395152607 (or 9395152603 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 75161220808 in words is "seventy-five billion, one hundred sixty-one million, two hundred twenty thousand, eight hundred eight".