75561973903 has 8 divisors (see below), whose sum is σ = 84180448800. Its totient is φ = 67344358368.

The previous prime is 75561973849. The next prime is 75561973933. The reversal of 75561973903 is 30937916557.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75561973903 - 2²¹ = 75559876751 is a prime.

It is a super-2 number, since 2×75561973903² (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 (75561973933) 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 7 ways as a sum of consecutive naturals, for example, 100214443 + ... + 100215196.

It is an arithmetic number, because the mean of its divisors is an integer number (10522556100).

Almost surely, 2^75561973903 is an apocalyptic number.

75561973903 is a deficient number, since it is larger than the sum of its proper divisors (8618474897).

75561973903 is a wasteful number, since it uses less digits than its factorization.

75561973903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200429681.

The product of its (nonzero) digits is 5358150, while the sum is 55.

The spelling of 75561973903 in words is "seventy-five billion, five hundred sixty-one million, nine hundred seventy-three thousand, nine hundred three".