71801489764 has 9 divisors (see below), whose sum is σ = 125653544947. Its totient is φ = 35900476924.

The previous prime is 71801489729. The next prime is 71801489791. The reversal of 71801489764 is 46798410817.

The square root of 71801489764 is 267958.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 468927 + ... + 602905.

Almost surely, 2^71801489764 is an apocalyptic number.

71801489764 is the 267958-th square number.

It is an amenable number.

71801489764 is a deficient number, since it is larger than the sum of its proper divisors (53852055183).

71801489764 is an frugal number, since it uses more digits than its factorization.

71801489764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267962 (or 133981 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 71801489764 in words is "seventy-one billion, eight hundred one million, four hundred eighty-nine thousand, seven hundred sixty-four".