77271345 has 24 divisors (see below), whose sum is σ = 134160000. Its totient is φ = 41142816.

The previous prime is 77271343. The next prime is 77271353. The reversal of 77271345 is 54317277.

It is not a de Polignac number, because 77271345 - 2¹ = 77271343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77271343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37656 + ... + 39654.

It is an arithmetic number, because the mean of its divisors is an integer number (5590000).

Almost surely, 2^77271345 is an apocalyptic number.

It is an amenable number.

77271345 is a deficient number, since it is larger than the sum of its proper divisors (56888655).

77271345 is a wasteful number, since it uses less digits than its factorization.

77271345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869 (or 2866 counting only the distinct ones).

The product of its digits is 41160, while the sum is 36.

The square root of 77271345 is about 8790.4121063805. The cubic root of 77271345 is about 425.9312360079.

The spelling of 77271345 in words is "seventy-seven million, two hundred seventy-one thousand, three hundred forty-five".