69713647081 has 4 divisors (see below), whose sum is σ = 75076235332. Its totient is φ = 64351058832.

The previous prime is 69713647079. The next prime is 69713647093. The reversal of 69713647081 is 18074631796.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37651521600 + 32062125481 = 194040^2 + 179059^2 .

It is a cyclic number.

It is not a de Polignac number, because 69713647081 - 2¹ = 69713647079 is a prime.

It is a super-2 number, since 2×69713647081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69713647681) 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, 2681294106 + ... + 2681294131.

It is an arithmetic number, because the mean of its divisors is an integer number (18769058833).

Almost surely, 2^69713647081 is an apocalyptic number.

It is an amenable number.

69713647081 is a deficient number, since it is larger than the sum of its proper divisors (5362588251).

69713647081 is a wasteful number, since it uses less digits than its factorization.

69713647081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362588250.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 69713647081 in words is "sixty-nine billion, seven hundred thirteen million, six hundred forty-seven thousand, eighty-one".