75781253121792 has 144 divisors (see below), whose sum is σ = 201820718980608. Its totient is φ = 25243883642880.

The previous prime is 75781253121689. The next prime is 75781253121799. The reversal of 75781253121792 is 29712135218757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75781253121799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13622368803 + ... + 13622374365.

Almost surely, 2^{75781253121792} is an apocalyptic number.

It is an amenable number.

75781253121792 is an abundant number, since it is smaller than the sum of its proper divisors (126039465858816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75781253121792 is a wasteful number, since it uses less digits than its factorization.

75781253121792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14006 (or 13992 counting only the distinct ones).

The product of its digits is 14817600, while the sum is 60.

The spelling of 75781253121792 in words is "seventy-five trillion, seven hundred eighty-one billion, two hundred fifty-three million, one hundred twenty-one thousand, seven hundred ninety-two".