77328608015 has 4 divisors (see below), whose sum is σ = 92794329624. Its totient is φ = 61862886408.

The previous prime is 77328608009. The next prime is 77328608017. The reversal of 77328608015 is 51080682377.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51080682377 = 70297 ⋅726641.

It is a cyclic number.

It is not a de Polignac number, because 77328608015 - 2¹⁴ = 77328591631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77328608017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7732860797 + ... + 7732860806.

It is an arithmetic number, because the mean of its divisors is an integer number (23198582406).

Almost surely, 2^77328608015 is an apocalyptic number.

77328608015 is a deficient number, since it is larger than the sum of its proper divisors (15465721609).

77328608015 is a wasteful number, since it uses less digits than its factorization.

77328608015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15465721608.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 77328608015 in words is "seventy-seven billion, three hundred twenty-eight million, six hundred eight thousand, fifteen".