69958687385161 has 9 divisors (see below), whose sum is σ = 70754324978631. Its totient is φ = 69171898674384.

The previous prime is 69958687385141. The next prime is 69958687385219. The reversal of 69958687385161 is 16158378685996.

The square root of 69958687385161 is 8364131.

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

It can be written as a sum of positive squares in only one way, i.e., 13433551762761 + 56525135622400 = 3665181^2 + 7518320^2 .

It is not a de Polignac number, because 69958687385161 - 2³⁷ = 69821248431689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69958687385141) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 744360670 + ... + 744454648.

Almost surely, 2^{69958687385161} is an apocalyptic number.

69958687385161 is the 8364131-st square number.

69958687385161 is the 4182066-th centered octagonal number.

It is an amenable number.

69958687385161 is a deficient number, since it is larger than the sum of its proper divisors (795637593470).

69958687385161 is an frugal number, since it uses more digits than its factorization.

69958687385161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188136 (or 94068 counting only the distinct ones).

The product of its digits is 4702924800, while the sum is 82.

The spelling of 69958687385161 in words is "sixty-nine trillion, nine hundred fifty-eight billion, six hundred eighty-seven million, three hundred eighty-five thousand, one hundred sixty-one".