78065544 has 16 divisors (see below), whose sum is σ = 195163920. Its totient is φ = 26021840.

The previous prime is 78065539. The next prime is 78065551. The reversal of 78065544 is 44556087.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1626342 + ... + 1626389.

It is an arithmetic number, because the mean of its divisors is an integer number (12197745).

Almost surely, 2^78065544 is an apocalyptic number.

It is an amenable number.

78065544 is an abundant number, since it is smaller than the sum of its proper divisors (117098376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78065544 is a wasteful number, since it uses less digits than its factorization.

78065544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252740 (or 3252736 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 78065544 is about 8835.4707854194. The cubic root of 78065544 is about 427.3855129285.

The spelling of 78065544 in words is "seventy-eight million, sixty-five thousand, five hundred forty-four".