70806139920 has 60 divisors (see below), whose sum is σ = 237790622316. Its totient is φ = 18881637120.

The previous prime is 70806139913. The next prime is 70806139927. The reversal of 70806139920 is 2993160807.

70806139920 is a `hidden beast` number, since 7 + 0 + 8 + 0 + 613 + 9 + 9 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (70806139913) and next prime (70806139927).

It can be written as a sum of positive squares in 2 ways, for example, as 21984585984 + 48821553936 = 148272^2 + 220956^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (70806139927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49170211 + ... + 49171650.

Almost surely, 2^70806139920 is an apocalyptic number.

It is an amenable number.

70806139920 is an abundant number, since it is smaller than the sum of its proper divisors (166984482396).

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

70806139920 is a wasteful number, since it uses less digits than its factorization.

70806139920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98341880 (or 98341871 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 70806139920 in words is "seventy billion, eight hundred six million, one hundred thirty-nine thousand, nine hundred twenty".