70081612720 has 160 divisors (see below), whose sum is σ = 194585545728. Its totient is φ = 22951087104.

The previous prime is 70081612693. The next prime is 70081612729. The reversal of 70081612720 is 2721618007.

It is a happy number.

It is a super-2 number, since 2×70081612720² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (70081612729) 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 31 ways as a sum of consecutive naturals, for example, 10261947 + ... + 10268773.

Almost surely, 2^70081612720 is an apocalyptic number.

70081612720 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 70081612720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97292772864).

70081612720 is an abundant number, since it is smaller than the sum of its proper divisors (124503933008).

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

70081612720 is a wasteful number, since it uses less digits than its factorization.

70081612720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7667 (or 7661 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The spelling of 70081612720 in words is "seventy billion, eighty-one million, six hundred twelve thousand, seven hundred twenty".