75421204688720 has 80 divisors (see below), whose sum is σ = 201363790553280. Its totient is φ = 25982424576000.

The previous prime is 75421204688717. The next prime is 75421204688729. The reversal of 75421204688720 is 2788640212457.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75421204688729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2255402081 + ... + 2255435520.

It is an arithmetic number, because the mean of its divisors is an integer number (2517047381916).

Almost surely, 2^{75421204688720} is an apocalyptic number.

It is an amenable number.

75421204688720 is an abundant number, since it is smaller than the sum of its proper divisors (125942585864560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75421204688720 is a wasteful number, since it uses less digits than its factorization.

75421204688720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4510837644 (or 4510837638 counting only the distinct ones).

The product of its (nonzero) digits is 12042240, while the sum is 56.

The spelling of 75421204688720 in words is "seventy-five trillion, four hundred twenty-one billion, two hundred four million, six hundred eighty-eight thousand, seven hundred twenty".