70987979520 has 432 divisors, whose sum is σ = 251822844000. Its totient is φ = 18456182784.

The previous prime is 70987979519. The next prime is 70987979537. The reversal of 70987979520 is 2597978907.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142260231 + ... + 142260729.

It is an arithmetic number, because the mean of its divisors is an integer number (582923250).

Almost surely, 2^70987979520 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 70987979520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125911422000).

70987979520 is an abundant number, since it is smaller than the sum of its proper divisors (180834864480).

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

70987979520 is a wasteful number, since it uses less digits than its factorization.

70987979520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 20003760, while the sum is 63.

The spelling of 70987979520 in words is "seventy billion, nine hundred eighty-seven million, nine hundred seventy-nine thousand, five hundred twenty".