771144992 has 18 divisors (see below), whose sum is σ = 1518501033. Its totient is φ = 385493952.

The previous prime is 771144977. The next prime is 771145019. The reversal of 771144992 is 299441177.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 451307536 + 319837456 = 21244^2 + 17884^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=19636.

It is a Duffinian number.

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 2 ways as a sum of consecutive naturals, for example, 154634 + ... + 159542.

Almost surely, 2^771144992 is an apocalyptic number.

It is an amenable number.

771144992 is a deficient number, since it is larger than the sum of its proper divisors (747356041).

771144992 is an frugal number, since it uses more digits than its factorization.

771144992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9828 (or 4911 counting only the distinct ones).

The product of its digits is 127008, while the sum is 44.

The square root of 771144992 is about 27769.4975107581. The cubic root of 771144992 is about 917.0197322631.

Multiplying 771144992 by its product of digits (127008), we get a square (97941583143936 = 9896544²).

The spelling of 771144992 in words is "seven hundred seventy-one million, one hundred forty-four thousand, nine hundred ninety-two".