70781916020 has 24 divisors (see below), whose sum is σ = 148660295784. Its totient is φ = 28309286016.

The previous prime is 70781915999. The next prime is 70781916041. The reversal of 70781916020 is 2061918707.

It is an interprime number because it is at equal distance from previous prime (70781915999) and next prime (70781916041).

It can be written as a sum of positive squares in 4 ways, for example, as 9291803236 + 61490112784 = 96394^2 + 247972^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47519 + ... + 379238.

It is an arithmetic number, because the mean of its divisors is an integer number (6194178991).

Almost surely, 2^70781916020 is an apocalyptic number.

It is an amenable number.

70781916020 is an abundant number, since it is smaller than the sum of its proper divisors (77878379764).

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

70781916020 is a wasteful number, since it uses less digits than its factorization.

70781916020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435059 (or 435057 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 41.

The spelling of 70781916020 in words is "seventy billion, seven hundred eighty-one million, nine hundred sixteen thousand, twenty".