71943782540 has 72 divisors (see below), whose sum is σ = 176134049280. Its totient is φ = 24612311808.

The previous prime is 71943782509. The next prime is 71943782551. The reversal of 71943782540 is 4528734917.

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 23 ways as a sum of consecutive naturals, for example, 367541 + ... + 528179.

It is an arithmetic number, because the mean of its divisors is an integer number (2446306240).

Almost surely, 2^71943782540 is an apocalyptic number.

71943782540 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 71943782540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88067024640).

71943782540 is an abundant number, since it is smaller than the sum of its proper divisors (104190266740).

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

71943782540 is a wasteful number, since it uses less digits than its factorization.

71943782540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161119 (or 161110 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 71943782540 in words is "seventy-one billion, nine hundred forty-three million, seven hundred eighty-two thousand, five hundred forty".