77649165 has 32 divisors (see below), whose sum is σ = 150595200. Its totient is φ = 37647360.

The previous prime is 77649139. The next prime is 77649167. The reversal of 77649165 is 56194677.

It is a happy number.

It is not a de Polignac number, because 77649165 - 2⁶ = 77649101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77649165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77649167) 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 31 ways as a sum of consecutive naturals, for example, 24660 + ... + 27629.

It is an arithmetic number, because the mean of its divisors is an integer number (4706100).

Almost surely, 2^77649165 is an apocalyptic number.

It is an amenable number.

77649165 is a deficient number, since it is larger than the sum of its proper divisors (72946035).

77649165 is a wasteful number, since it uses less digits than its factorization.

77649165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52314 (or 52308 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 77649165 is about 8811.8763609120. The cubic root of 77649165 is about 426.6243077930.

The spelling of 77649165 in words is "seventy-seven million, six hundred forty-nine thousand, one hundred sixty-five".