70440481664 has 64 divisors (see below), whose sum is σ = 160461512160. Its totient is φ = 30173036544.

The previous prime is 70440481621. The next prime is 70440481717. The reversal of 70440481664 is 46618404407.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×70440481664² (a number of 22 digits) contains 22 as substring.

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, 1787744 + ... + 1826720.

Almost surely, 2^70440481664 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 70440481664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80230756080).

70440481664 is an abundant number, since it is smaller than the sum of its proper divisors (90021030496).

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

70440481664 is a wasteful number, since it uses less digits than its factorization.

70440481664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41015 (or 41003 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 44.

The spelling of 70440481664 in words is "seventy billion, four hundred forty million, four hundred eighty-one thousand, six hundred sixty-four".