70249904640 has 320 divisors, whose sum is σ = 260388691200. Its totient is φ = 17918410752.

The previous prime is 70249904639. The next prime is 70249904687. The reversal of 70249904640 is 4640994207.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 1567666 + ... + 1611854.

It is an arithmetic number, because the mean of its divisors is an integer number (813714660).

Almost surely, 2^70249904640 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 70249904640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130194345600).

70249904640 is an abundant number, since it is smaller than the sum of its proper divisors (190138786560).

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

70249904640 is a wasteful number, since it uses less digits than its factorization.

70249904640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44244 (or 44222 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 70249904640 in words is "seventy billion, two hundred forty-nine million, nine hundred four thousand, six hundred forty".