75053533681 has 15 divisors (see below), whose sum is σ = 87572909273. Its totient is φ = 64320094020.

The previous prime is 75053533679. The next prime is 75053533703. The reversal of 75053533681 is 18633535057.

The square root of 75053533681 is 273959.

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

It is not a de Polignac number, because 75053533681 - 2¹ = 75053533679 is a prime.

It is a super-2 number, since 2×75053533681² (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 (75053531681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 13421196 + ... + 13426786.

Almost surely, 2^75053533681 is an apocalyptic number.

75053533681 is the 273959-th square number.

75053533681 is the 136980-th centered octagonal number.

It is an amenable number.

75053533681 is a deficient number, since it is larger than the sum of its proper divisors (12519375592).

75053533681 is an frugal number, since it uses more digits than its factorization.

75053533681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11210 (or 5598 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 75053533681 in words is "seventy-five billion, fifty-three million, five hundred thirty-three thousand, six hundred eighty-one".