75545124077 has 4 divisors (see below), whose sum is σ = 76783568796. Its totient is φ = 74306679360.

The previous prime is 75545124071. The next prime is 75545124089. The reversal of 75545124077 is 77042154557.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77042154557 = 9277 ⋅8304641.

It can be written as a sum of positive squares in 2 ways, for example, as 29482950436 + 46062173641 = 171706^2 + 214621^2 .

It is a cyclic number.

It is not a de Polignac number, because 75545124077 - 2⁶ = 75545124013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75545124071) 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, 619222268 + ... + 619222389.

It is an arithmetic number, because the mean of its divisors is an integer number (19195892199).

Almost surely, 2^75545124077 is an apocalyptic number.

It is an amenable number.

75545124077 is a deficient number, since it is larger than the sum of its proper divisors (1238444719).

75545124077 is a wasteful number, since it uses less digits than its factorization.

75545124077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238444718.

The product of its (nonzero) digits is 1372000, while the sum is 47.

The spelling of 75545124077 in words is "seventy-five billion, five hundred forty-five million, one hundred twenty-four thousand, seventy-seven".