77964481 has 8 divisors (see below), whose sum is σ = 89570304. Its totient is φ = 66475680.

The previous prime is 77964479. The next prime is 77964487. The reversal of 77964481 is 18446977.

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

It is a cyclic number.

It is not a de Polignac number, because 77964481 - 2¹ = 77964479 is a prime.

It is a super-2 number, since 2×77964481² = 12156920595198722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77964487) 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 7 ways as a sum of consecutive naturals, for example, 27820 + ... + 30493.

It is an arithmetic number, because the mean of its divisors is an integer number (11196288).

Almost surely, 2^77964481 is an apocalyptic number.

It is an amenable number.

77964481 is a deficient number, since it is larger than the sum of its proper divisors (11605823).

77964481 is a wasteful number, since it uses less digits than its factorization.

77964481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58511.

The product of its digits is 338688, while the sum is 46.

The square root of 77964481 is about 8829.7497699538. The cubic root of 77964481 is about 427.2010033812.

The spelling of 77964481 in words is "seventy-seven million, nine hundred sixty-four thousand, four hundred eighty-one".