71810457230640 has 160 divisors (see below), whose sum is σ = 223994813789376. Its totient is φ = 19030883696640.

The previous prime is 71810457230621. The next prime is 71810457230717. The reversal of 71810457230640 is 4603275401817.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 71810457230640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25363050 + ... + 28051830.

Almost surely, 2^{71810457230640} 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 71810457230640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111997406894688).

71810457230640 is an abundant number, since it is smaller than the sum of its proper divisors (152184356558736).

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

71810457230640 is a wasteful number, since it uses less digits than its factorization.

71810457230640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689487 (or 2689481 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 71810457230640 in words is "seventy-one trillion, eight hundred ten billion, four hundred fifty-seven million, two hundred thirty thousand, six hundred forty".