77742464 has 16 divisors (see below), whose sum is σ = 154877820. Its totient is φ = 38871168.

The previous prime is 77742463. The next prime is 77742529. The reversal of 77742464 is 46424777.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77742463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303554 + ... + 303809.

Almost surely, 2^77742464 is an apocalyptic number.

It is an amenable number.

77742464 is a deficient number, since it is larger than the sum of its proper divisors (77135356).

77742464 is an equidigital number, since it uses as much as digits as its factorization.

77742464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607377 (or 607365 counting only the distinct ones).

The product of its digits is 263424, while the sum is 41.

The square root of 77742464 is about 8817.1687065633. The cubic root of 77742464 is about 426.7951088998.

The spelling of 77742464 in words is "seventy-seven million, seven hundred forty-two thousand, four hundred sixty-four".