70809649920 has 216 divisors, whose sum is σ = 257889231600. Its totient is φ = 17888698368.

The previous prime is 70809649919. The next prime is 70809649931. The reversal of 70809649920 is 2994690807.

70809649920 is a `hidden beast` number, since 70 + 80 + 9 + 6 + 499 + 2 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57126 + ... + 380634.

Almost surely, 2^70809649920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70809649920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128944615800).

70809649920 is an abundant number, since it is smaller than the sum of its proper divisors (187079581680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70809649920 is a wasteful number, since it uses less digits than its factorization.

70809649920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323555 (or 323538 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 70809649920 in words is "seventy billion, eight hundred nine million, six hundred forty-nine thousand, nine hundred twenty".