70155728789 has 4 divisors (see below), whose sum is σ = 70156446624. Its totient is φ = 70155010956.

The previous prime is 70155728777. The next prime is 70155728831. The reversal of 70155728789 is 98782755107.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98782755107 = 797 ⋅123943231.

It is a cyclic number.

It is not a de Polignac number, because 70155728789 - 2¹² = 70155724693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70155728719) 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, 183857 + ... + 417270.

It is an arithmetic number, because the mean of its divisors is an integer number (17539111656).

Almost surely, 2^70155728789 is an apocalyptic number.

It is an amenable number.

70155728789 is a deficient number, since it is larger than the sum of its proper divisors (717835).

70155728789 is a wasteful number, since it uses less digits than its factorization.

70155728789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717834.

The product of its (nonzero) digits is 9878400, while the sum is 59.

The spelling of 70155728789 in words is "seventy billion, one hundred fifty-five million, seven hundred twenty-eight thousand, seven hundred eighty-nine".