70161520 has 80 divisors (see below), whose sum is σ = 191675232. Its totient is φ = 23546880.

The previous prime is 70161517. The next prime is 70161563. The reversal of 70161520 is 2516107.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 70161491 and 70161500.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 8374 + ... + 14506.

Almost surely, 2^70161520 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 70161520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95837616).

70161520 is an abundant number, since it is smaller than the sum of its proper divisors (121513712).

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

70161520 is a wasteful number, since it uses less digits than its factorization.

70161520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6170 (or 6164 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 70161520 is about 8376.2473697951. The cubic root of 70161520 is about 412.4452722007.

Adding to 70161520 its reverse (2516107), we get a palindrome (72677627).

The spelling of 70161520 in words is "seventy million, one hundred sixty-one thousand, five hundred twenty".