75499519779 has 12 divisors (see below), whose sum is σ = 110280198600. Its totient is φ = 49767473184.

The previous prime is 75499519769. The next prime is 75499519783. The reversal of 75499519779 is 97791599457.

75499519779 is a `hidden beast` number, since 7 + 549 + 9 + 5 + 1 + 9 + 7 + 79 = 666.

It is not a de Polignac number, because 75499519779 - 2⁵ = 75499519747 is a prime.

It is a super-2 number, since 2×75499519779² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (75499519709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47127489 + ... + 47129090.

It is an arithmetic number, because the mean of its divisors is an integer number (9190016550).

Almost surely, 2^75499519779 is an apocalyptic number.

75499519779 is a deficient number, since it is larger than the sum of its proper divisors (34780678821).

75499519779 is a wasteful number, since it uses less digits than its factorization.

75499519779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94256674 (or 94256671 counting only the distinct ones).

The product of its digits is 225042300, while the sum is 72.

The spelling of 75499519779 in words is "seventy-five billion, four hundred ninety-nine million, five hundred nineteen thousand, seven hundred seventy-nine".