77648841 has 32 divisors (see below), whose sum is σ = 120299520. Its totient is φ = 49451472.

The previous prime is 77648807. The next prime is 77648849. The reversal of 77648841 is 14884677.

It is not a de Polignac number, because 77648841 - 2⁶ = 77648777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77648849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53856 + ... + 55278.

It is an arithmetic number, because the mean of its divisors is an integer number (3759360).

Almost surely, 2^77648841 is an apocalyptic number.

It is an amenable number.

77648841 is a deficient number, since it is larger than the sum of its proper divisors (42650679).

77648841 is a wasteful number, since it uses less digits than its factorization.

77648841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522 (or 1516 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 77648841 is about 8811.8579766131. The cubic root of 77648841 is about 426.6237144126.

The spelling of 77648841 in words is "seventy-seven million, six hundred forty-eight thousand, eight hundred forty-one".