77369649 has 16 divisors (see below), whose sum is σ = 118028160. Its totient is φ = 44161920.

The previous prime is 77369641. The next prime is 77369681. The reversal of 77369649 is 94696377.

It is not a de Polignac number, because 77369649 - 2³ = 77369641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77369641) 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 15 ways as a sum of consecutive naturals, for example, 26347 + ... + 29135.

It is an arithmetic number, because the mean of its divisors is an integer number (7376760).

Almost surely, 2^77369649 is an apocalyptic number.

It is an amenable number.

77369649 is a deficient number, since it is larger than the sum of its proper divisors (40658511).

77369649 is a wasteful number, since it uses less digits than its factorization.

77369649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4120.

The product of its digits is 1714608, while the sum is 51.

The square root of 77369649 is about 8796.0018758525. The cubic root of 77369649 is about 426.1117815943. Note that the first 3 decimals are identical.

The spelling of 77369649 in words is "seventy-seven million, three hundred sixty-nine thousand, six hundred forty-nine".