70959902689 has 27 divisors (see below), whose sum is σ = 79517145177. Its totient is φ = 63292600800.

The previous prime is 70959902677. The next prime is 70959902719. The reversal of 70959902689 is 98620995907.

The square root of 70959902689 is 266383.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 412293025 + 70547609664 = 20305^2 + 265608^2 .

It is a de Polignac number, because none of the positive numbers 2^k-70959902689 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 70959902689.

It is not an unprimeable number, because it can be changed into a prime (70959902639) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 107352019 + ... + 107352679.

It is an arithmetic number, because the mean of its divisors is an integer number (2945079451).

Almost surely, 2^70959902689 is an apocalyptic number.

70959902689 is the 266383-rd square number.

70959902689 is the 133192-nd centered octagonal number.

It is an amenable number.

70959902689 is a deficient number, since it is larger than the sum of its proper divisors (8557242488).

70959902689 is an frugal number, since it uses more digits than its factorization.

70959902689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 64.

Multiplying 70959902689 by its sum of digits (64), we get a square (4541433772096 = 2131064²).

The spelling of 70959902689 in words is "seventy billion, nine hundred fifty-nine million, nine hundred two thousand, six hundred eighty-nine".