75073390521 has 4 divisors (see below), whose sum is σ = 100097854032. Its totient is φ = 50048927012.

The previous prime is 75073390517. The next prime is 75073390543. The reversal of 75073390521 is 12509337057.

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.

It is a cyclic number.

It is not a de Polignac number, because 75073390521 - 2² = 75073390517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75073390621) 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, 12512231751 + ... + 12512231756.

It is an arithmetic number, because the mean of its divisors is an integer number (25024463508).

Almost surely, 2^75073390521 is an apocalyptic number.

It is an amenable number.

75073390521 is a deficient number, since it is larger than the sum of its proper divisors (25024463511).

75073390521 is a wasteful number, since it uses less digits than its factorization.

75073390521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25024463510.

The product of its (nonzero) digits is 198450, while the sum is 42.

The spelling of 75073390521 in words is "seventy-five billion, seventy-three million, three hundred ninety thousand, five hundred twenty-one".