75400723522881 has 9 divisors (see below), whose sum is σ = 108912193827619. Its totient is φ = 50267131648536.

The previous prime is 75400723522871. The next prime is 75400723522931. The reversal of 75400723522881 is 18822532700457.

The square root of 75400723522881 is 8683359.

It is a perfect power (a square), and thus also a powerful number.

75400723522881 is a `hidden beast` number, since 7 + 5 + 4 + 0 + 0 + 7 + 2 + 352 + 288 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25519218239025 + 49881505283856 = 5051655^2 + 7062684^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 75400723522881 - 2¹⁹ = 75400722998593 is a prime.

It is a super-2 number, since 2×75400723522881² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75400723522871) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24602851 + ... + 27497303.

Almost surely, 2^{75400723522881} is an apocalyptic number.

75400723522881 is the 8683359-th square number.

75400723522881 is the 4341680-th centered octagonal number.

It is an amenable number.

75400723522881 is a deficient number, since it is larger than the sum of its proper divisors (33511470304738).

75400723522881 is an frugal number, since it uses more digits than its factorization.

75400723522881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5788912 (or 2894456 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 54.

The spelling of 75400723522881 in words is "seventy-five trillion, four hundred billion, seven hundred twenty-three million, five hundred twenty-two thousand, eight hundred eighty-one".