75447120777761 has 8 divisors (see below), whose sum is σ = 75635818416864. Its totient is φ = 75258425876800.

The previous prime is 75447120777739. The next prime is 75447120777767. The reversal of 75447120777761 is 16777702174457.

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 75447120777761 - 2¹⁰ = 75447120776737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75447120777767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61559006 + ... + 62772648.

It is an arithmetic number, because the mean of its divisors is an integer number (9454477302108).

Almost surely, 2^{75447120777761} is an apocalyptic number.

It is an amenable number.

75447120777761 is a deficient number, since it is larger than the sum of its proper divisors (188697639103).

75447120777761 is a wasteful number, since it uses less digits than its factorization.

75447120777761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369071.

The product of its (nonzero) digits is 112943040, while the sum is 65.

The spelling of 75447120777761 in words is "seventy-five trillion, four hundred forty-seven billion, one hundred twenty million, seven hundred seventy-seven thousand, seven hundred sixty-one".