70420907520 has 400 divisors, whose sum is σ = 253497681360. Its totient is φ = 18684297216.

The previous prime is 70420907497. The next prime is 70420907521. The reversal of 70420907520 is 2570902407.

70420907520 is a `hidden beast` number, since 7 + 0 + 42 + 0 + 90 + 7 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70420907521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 47484699 + ... + 47486181.

Almost surely, 2^70420907520 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 70420907520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126748840680).

70420907520 is an abundant number, since it is smaller than the sum of its proper divisors (183076773840).

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

70420907520 is a wasteful number, since it uses less digits than its factorization.

70420907520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747 (or 1722 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 70420907520 in words is "seventy billion, four hundred twenty million, nine hundred seven thousand, five hundred twenty".