75124720401 has 4 divisors (see below), whose sum is σ = 100166293872. Its totient is φ = 50083146932.

The previous prime is 75124720397. The next prime is 75124720409. The reversal of 75124720401 is 10402742157.

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 75124720401 - 2² = 75124720397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75124720409) 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, 12520786731 + ... + 12520786736.

It is an arithmetic number, because the mean of its divisors is an integer number (25041573468).

Almost surely, 2^75124720401 is an apocalyptic number.

It is an amenable number.

75124720401 is a deficient number, since it is larger than the sum of its proper divisors (25041573471).

75124720401 is a wasteful number, since it uses less digits than its factorization.

75124720401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25041573470.

The product of its (nonzero) digits is 15680, while the sum is 33.

The spelling of 75124720401 in words is "seventy-five billion, one hundred twenty-four million, seven hundred twenty thousand, four hundred one".