70144778064 has 80 divisors (see below), whose sum is σ = 183635871552. Its totient is φ = 23068990464.

The previous prime is 70144778027. The next prime is 70144778069. The reversal of 70144778064 is 46087744107.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70144778069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3068244 + ... + 3091020.

Almost surely, 2^70144778064 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 70144778064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91817935776).

70144778064 is an abundant number, since it is smaller than the sum of its proper divisors (113491093488).

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

70144778064 is a wasteful number, since it uses less digits than its factorization.

70144778064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23644 (or 23638 counting only the distinct ones).

The product of its (nonzero) digits is 1053696, while the sum is 48.

The spelling of 70144778064 in words is "seventy billion, one hundred forty-four million, seven hundred seventy-eight thousand, sixty-four".