71428976644 has 9 divisors (see below), whose sum is σ = 125001644551. Its totient is φ = 35714221060.

The previous prime is 71428976627. The next prime is 71428976651. The reversal of 71428976644 is 44667982417.

It is a happy number.

The square root of 71428976644 is 267262.

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 polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 467709 + ... + 601339.

Almost surely, 2^71428976644 is an apocalyptic number.

71428976644 is the 267262-nd square number.

It is an amenable number.

71428976644 is a deficient number, since it is larger than the sum of its proper divisors (53572667907).

71428976644 is an frugal number, since it uses more digits than its factorization.

71428976644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267266 (or 133633 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 58.

The spelling of 71428976644 in words is "seventy-one billion, four hundred twenty-eight million, nine hundred seventy-six thousand, six hundred forty-four".