70257424720 has 160 divisors (see below), whose sum is σ = 195827466240. Its totient is φ = 22919508480.

The previous prime is 70257424669. The next prime is 70257424723. The reversal of 70257424720 is 2742475207.

It is a super-2 number, since 2×70257424720² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70257424723) 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 31 ways as a sum of consecutive naturals, for example, 2445801 + ... + 2474359.

It is an arithmetic number, because the mean of its divisors is an integer number (1223921664).

Almost surely, 2^70257424720 is an apocalyptic number.

70257424720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70257424720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97913733120).

70257424720 is an abundant number, since it is smaller than the sum of its proper divisors (125570041520).

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

70257424720 is a wasteful number, since it uses less digits than its factorization.

70257424720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28793 (or 28787 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 40.

Adding to 70257424720 its reverse (2742475207), we get a palindrome (72999899927).

The spelling of 70257424720 in words is "seventy billion, two hundred fifty-seven million, four hundred twenty-four thousand, seven hundred twenty".