70478653640 has 32 divisors (see below), whose sum is σ = 159118215480. Its totient is φ = 28095240192.

The previous prime is 70478653633. The next prime is 70478653643. The reversal of 70478653640 is 4635687407.

It can be written as a sum of positive squares in 4 ways, for example, as 69424872196 + 1053781444 = 263486^2 + 32462^2 .

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (70478653643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2995049 + ... + 3018488.

Almost surely, 2^70478653640 is an apocalyptic number.

It is an amenable number.

70478653640 is an abundant number, since it is smaller than the sum of its proper divisors (88639561840).

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

70478653640 is a wasteful number, since it uses less digits than its factorization.

70478653640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6013841 (or 6013837 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 50.

The spelling of 70478653640 in words is "seventy billion, four hundred seventy-eight million, six hundred fifty-three thousand, six hundred forty".