77646484 has 24 divisors (see below), whose sum is σ = 138905928. Its totient is φ = 37964160.

The previous prime is 77646467. The next prime is 77646487. The reversal of 77646484 is 48464677.

It can be written as a sum of positive squares in 4 ways, for example, as 40704400 + 36942084 = 6380^2 + 6078^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77646487) 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, 114354 + ... + 115030.

It is an arithmetic number, because the mean of its divisors is an integer number (5787747).

Almost surely, 2^77646484 is an apocalyptic number.

It is an amenable number.

77646484 is a deficient number, since it is larger than the sum of its proper divisors (61259444).

77646484 is a wasteful number, since it uses less digits than its factorization.

77646484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275 (or 1273 counting only the distinct ones).

The product of its digits is 903168, while the sum is 46.

The square root of 77646484 is about 8811.7242353583. The cubic root of 77646484 is about 426.6193977040.

The spelling of 77646484 in words is "seventy-seven million, six hundred forty-six thousand, four hundred eighty-four".