75479039791 has 4 divisors (see below), whose sum is σ = 75481898992. Its totient is φ = 75476180592.

The previous prime is 75479039719. The next prime is 75479039821. The reversal of 75479039791 is 19793097457.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 75479039791 - 2¹¹ = 75479037743 is a prime.

It is a super-2 number, since 2×75479039791² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75479039711) 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, 1389630 + ... + 1442923.

It is an arithmetic number, because the mean of its divisors is an integer number (18870474748).

Almost surely, 2^75479039791 is an apocalyptic number.

75479039791 is a deficient number, since it is larger than the sum of its proper divisors (2859201).

75479039791 is a wasteful number, since it uses less digits than its factorization.

75479039791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2859200.

The product of its (nonzero) digits is 15002820, while the sum is 61.

The spelling of 75479039791 in words is "seventy-five billion, four hundred seventy-nine million, thirty-nine thousand, seven hundred ninety-one".