749980178693 has 4 divisors (see below), whose sum is σ = 750086914080. Its totient is φ = 749873443308.

The previous prime is 749980178687. The next prime is 749980178741. The reversal of 749980178693 is 396871089947.

749980178693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 396871089947 = 489257 ⋅811171.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-749980178693 is a prime.

It is a super-2 number, since 2×749980178693² (a number of 25 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 (749980177693) 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, 53357153 + ... + 53371206.

It is an arithmetic number, because the mean of its divisors is an integer number (187521728520).

Almost surely, 2^749980178693 is an apocalyptic number.

It is an amenable number.

749980178693 is a deficient number, since it is larger than the sum of its proper divisors (106735387).

749980178693 is a wasteful number, since it uses less digits than its factorization.

749980178693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106735386.

The product of its (nonzero) digits is 164602368, while the sum is 71.

The spelling of 749980178693 in words is "seven hundred forty-nine billion, nine hundred eighty million, one hundred seventy-eight thousand, six hundred ninety-three".