75421012457 has 4 divisors (see below), whose sum is σ = 86195442816. Its totient is φ = 64646582100.

The previous prime is 75421012439. The next prime is 75421012477.

It is a happy number.

75421012457 is nontrivially palindromic in base 10.

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 75421012457 - 2¹⁰ = 75421011433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75421012457.

It is not an unprimeable number, because it can be changed into a prime (75421012477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5387215169 + ... + 5387215182.

It is an arithmetic number, because the mean of its divisors is an integer number (21548860704).

Almost surely, 2^75421012457 is an apocalyptic number.

It is an amenable number.

75421012457 is a deficient number, since it is larger than the sum of its proper divisors (10774430359).

75421012457 is a wasteful number, since it uses less digits than its factorization.

75421012457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10774430358.

The product of its (nonzero) digits is 78400, while the sum is 38.

It can be divided in two parts, 754210 and 12457, that added together give a palindrome (766667).

The spelling of 75421012457 in words is "seventy-five billion, four hundred twenty-one million, twelve thousand, four hundred fifty-seven".