70021155840 has 704 divisors, whose sum is σ = 252132756480. Its totient is φ = 16494100480.

The previous prime is 70021155797. The next prime is 70021155877. The reversal of 70021155840 is 4855112007.

It is a super-2 number, since 2×70021155840² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 534512575 + ... + 534512705.

It is an arithmetic number, because the mean of its divisors is an integer number (358143120).

Almost surely, 2^70021155840 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 70021155840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126066378240).

70021155840 is an abundant number, since it is smaller than the sum of its proper divisors (182111600640).

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

70021155840 is a wasteful number, since it uses less digits than its factorization.

70021155840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 33.

Adding to 70021155840 its reverse (4855112007), we get a palindrome (74876267847).

The spelling of 70021155840 in words is "seventy billion, twenty-one million, one hundred fifty-five thousand, eight hundred forty".