75000080000021 has 96 divisors (see below), whose sum is σ = 85989100055040. Its totient is φ = 65327579757440.

The previous prime is 75000080000003. The next prime is 75000080000029. The reversal of 75000080000021 is 12000008000057.

It is not a de Polignac number, because 75000080000021 - 2¹⁰ = 75000079998997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75000080000029) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 32065018070 + ... + 32065020408.

It is an arithmetic number, because the mean of its divisors is an integer number (895719792240).

Almost surely, 2^{75000080000021} is an apocalyptic number.

75000080000021 is the 5000003-rd octagonal number.

It is an amenable number.

75000080000021 is a deficient number, since it is larger than the sum of its proper divisors (10989020055019).

75000080000021 is a wasteful number, since it uses less digits than its factorization.

75000080000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3167 (or 3156 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

Adding to 75000080000021 its reverse (12000008000057), we get a palindrome (87000088000078).

The spelling of 75000080000021 in words is "seventy-five trillion, eighty million, twenty-one", and thus it is an aban number and an uban number.