77847375949456 has 15 divisors (see below), whose sum is σ = 150829359281251. Its totient is φ = 38923670328496.

The previous prime is 77847375949429. The next prime is 77847375949477. The reversal of 77847375949456 is 65494957374877.

It is a happy number.

The square root of 77847375949456 is 8823116.

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, 34189575 + ... + 36395353.

Almost surely, 2^{77847375949456} is an apocalyptic number.

77847375949456 is the 8823116-th square number.

It is an amenable number.

77847375949456 is a deficient number, since it is larger than the sum of its proper divisors (72981983331795).

77847375949456 is an frugal number, since it uses more digits than its factorization.

77847375949456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4411566 (or 2205781 counting only the distinct ones).

The product of its digits is 44808422400, while the sum is 85.

The spelling of 77847375949456 in words is "seventy-seven trillion, eight hundred forty-seven billion, three hundred seventy-five million, nine hundred forty-nine thousand, four hundred fifty-six".