75664068549 has 4 divisors (see below), whose sum is σ = 100885424736. Its totient is φ = 50442712364.

The previous prime is 75664068547. The next prime is 75664068569. The reversal of 75664068549 is 94586046657.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94586046657 = 3 ⋅31528682219.

It is a cyclic number.

It is not a de Polignac number, because 75664068549 - 2¹ = 75664068547 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 75664068492 and 75664068501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75664068547) 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, 12610678089 + ... + 12610678094.

It is an arithmetic number, because the mean of its divisors is an integer number (25221356184).

Almost surely, 2^75664068549 is an apocalyptic number.

It is an amenable number.

75664068549 is a deficient number, since it is larger than the sum of its proper divisors (25221356187).

75664068549 is a wasteful number, since it uses less digits than its factorization.

75664068549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25221356186.

The product of its (nonzero) digits is 43545600, while the sum is 60.

The spelling of 75664068549 in words is "seventy-five billion, six hundred sixty-four million, sixty-eight thousand, five hundred forty-nine".