70723178749 has 4 divisors (see below), whose sum is σ = 70723955164. Its totient is φ = 70722402336.

The previous prime is 70723178737. The next prime is 70723178761. The reversal of 70723178749 is 94787132707.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (70723178737) and next prime (70723178761).

It can be written as a sum of positive squares in 2 ways, for example, as 51005964025 + 19717214724 = 225845^2 + 140418^2 .

It is a cyclic number.

It is not a de Polignac number, because 70723178749 - 2¹⁹ = 70722654461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70723178749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70723172749) 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, 230112 + ... + 440905.

It is an arithmetic number, because the mean of its divisors is an integer number (17680988791).

Almost surely, 2^70723178749 is an apocalyptic number.

It is an amenable number.

70723178749 is a deficient number, since it is larger than the sum of its proper divisors (776415).

70723178749 is a wasteful number, since it uses less digits than its factorization.

70723178749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776414.

The product of its (nonzero) digits is 4148928, while the sum is 55.

The spelling of 70723178749 in words is "seventy billion, seven hundred twenty-three million, one hundred seventy-eight thousand, seven hundred forty-nine".