71813155780 has 48 divisors (see below), whose sum is σ = 152918970624. Its totient is φ = 28323336960.

The previous prime is 71813155753. The next prime is 71813155807. The reversal of 71813155780 is 8755131817.

It is an interprime number because it is at equal distance from previous prime (71813155753) and next prime (71813155807).

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 71813155780.

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 15 ways as a sum of consecutive naturals, for example, 7632559 + ... + 7641961.

It is an arithmetic number, because the mean of its divisors is an integer number (3185811888).

Almost surely, 2^71813155780 is an apocalyptic number.

It is an amenable number.

71813155780 is an abundant number, since it is smaller than the sum of its proper divisors (81105814844).

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

71813155780 is a wasteful number, since it uses less digits than its factorization.

71813155780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14716 (or 14714 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 46.

The spelling of 71813155780 in words is "seventy-one billion, eight hundred thirteen million, one hundred fifty-five thousand, seven hundred eighty".