71323782980 has 24 divisors (see below), whose sum is σ = 151462868760. Its totient is φ = 28208956160.

The previous prime is 71323782973. The next prime is 71323783019. The reversal of 71323782980 is 8928732317.

It can be written as a sum of positive squares in 4 ways, for example, as 9351663616 + 61972119364 = 96704^2 + 248942^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 20032991 + ... + 20036550.

It is an arithmetic number, because the mean of its divisors is an integer number (6310952865).

Almost surely, 2^71323782980 is an apocalyptic number.

It is an amenable number.

71323782980 is an abundant number, since it is smaller than the sum of its proper divisors (80139085780).

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

71323782980 is a wasteful number, since it uses less digits than its factorization.

71323782980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40069639 (or 40069637 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 71323782980 in words is "seventy-one billion, three hundred twenty-three million, seven hundred eighty-two thousand, nine hundred eighty".