78328407264 has 48 divisors (see below), whose sum is σ = 206313890832. Its totient is φ = 26020348928.

The previous prime is 78328407259. The next prime is 78328407277. The reversal of 78328407264 is 46270482387.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×78328407264² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1364229 + ... + 1420484.

It is an arithmetic number, because the mean of its divisors is an integer number (4298206059).

Almost surely, 2^78328407264 is an apocalyptic number.

It is an amenable number.

78328407264 is an abundant number, since it is smaller than the sum of its proper divisors (127985483568).

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

78328407264 is a wasteful number, since it uses less digits than its factorization.

78328407264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785019 (or 2785011 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 51.

The spelling of 78328407264 in words is "seventy-eight billion, three hundred twenty-eight million, four hundred seven thousand, two hundred sixty-four".