70809456681 has 24 divisors (see below), whose sum is σ = 102667385184. Its totient is φ = 47027882880.

The previous prime is 70809456673. The next prime is 70809456691. The reversal of 70809456681 is 18665490807.

70809456681 is a `hidden beast` number, since 70 + 8 + 0 + 9 + 4 + 566 + 8 + 1 = 666.

It is not a de Polignac number, because 70809456681 - 2³ = 70809456673 is a prime.

It is a super-2 number, since 2×70809456681² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (70809456631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4242705 + ... + 4259361.

It is an arithmetic number, because the mean of its divisors is an integer number (4277807716).

Almost surely, 2^70809456681 is an apocalyptic number.

It is an amenable number.

70809456681 is a deficient number, since it is larger than the sum of its proper divisors (31857928503).

70809456681 is a wasteful number, since it uses less digits than its factorization.

70809456681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18421 (or 18418 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 70809456681 in words is "seventy billion, eight hundred nine million, four hundred fifty-six thousand, six hundred eighty-one".