75473850721 has 4 divisors (see below), whose sum is σ = 76429216000. Its totient is φ = 74518485444.

The previous prime is 75473850719. The next prime is 75473850761. The reversal of 75473850721 is 12705837457.

It is a happy number.

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 75473850721 - 2¹ = 75473850719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75473850761) 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, 477682521 + ... + 477682678.

It is an arithmetic number, because the mean of its divisors is an integer number (19107304000).

Almost surely, 2^75473850721 is an apocalyptic number.

It is an amenable number.

75473850721 is a deficient number, since it is larger than the sum of its proper divisors (955365279).

75473850721 is an equidigital number, since it uses as much as digits as its factorization.

75473850721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955365278.

The product of its (nonzero) digits is 1646400, while the sum is 49.

The spelling of 75473850721 in words is "seventy-five billion, four hundred seventy-three million, eight hundred fifty thousand, seven hundred twenty-one".