75421645713 has 6 divisors (see below), whose sum is σ = 108942377154. Its totient is φ = 50281097136.

The previous prime is 75421645679. The next prime is 75421645721. The reversal of 75421645713 is 31754612457.

75421645713 is a `hidden beast` number, since 7 + 54 + 21 + 6 + 4 + 571 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 74097195264 + 1324450449 = 272208^2 + 36393^2 .

It is not a de Polignac number, because 75421645713 - 2²⁶ = 75354536849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75421645753) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4190091420 + ... + 4190091437.

It is an arithmetic number, because the mean of its divisors is an integer number (18157062859).

Almost surely, 2^75421645713 is an apocalyptic number.

It is an amenable number.

75421645713 is a deficient number, since it is larger than the sum of its proper divisors (33520731441).

75421645713 is a wasteful number, since it uses less digits than its factorization.

75421645713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8380182863 (or 8380182860 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The spelling of 75421645713 in words is "seventy-five billion, four hundred twenty-one million, six hundred forty-five thousand, seven hundred thirteen".