77645049 has 8 divisors (see below), whose sum is σ = 106866432. Its totient is φ = 50093520.

The previous prime is 77645017. The next prime is 77645059. The reversal of 77645049 is 94054677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77645049 - 2⁵ = 77645017 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 77645049.

It is not an unprimeable number, because it can be changed into a prime (77645059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417354 + ... + 417539.

It is an arithmetic number, because the mean of its divisors is an integer number (13358304).

Almost surely, 2^77645049 is an apocalyptic number.

It is an amenable number.

77645049 is a deficient number, since it is larger than the sum of its proper divisors (29221383).

77645049 is a wasteful number, since it uses less digits than its factorization.

77645049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834927.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 77645049 is about 8811.6428093744. The cubic root of 77645049 is about 426.6167695420.

The spelling of 77645049 in words is "seventy-seven million, six hundred forty-five thousand, forty-nine".