70391786440 has 128 divisors (see below), whose sum is σ = 173565957600. Its totient is φ = 25586565120.

The previous prime is 70391786407. The next prime is 70391786471. The reversal of 70391786440 is 4468719307.

It can be written as a sum of positive squares in 16 ways, for example, as 1179647716 + 69212138724 = 34346^2 + 263082^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2691346 + ... + 2717374.

Almost surely, 2^70391786440 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 70391786440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86782978800).

70391786440 is an abundant number, since it is smaller than the sum of its proper divisors (103174171160).

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

70391786440 is a wasteful number, since it uses less digits than its factorization.

70391786440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26195 (or 26191 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 70391786440 in words is "seventy billion, three hundred ninety-one million, seven hundred eighty-six thousand, four hundred forty".