78528108308511 has 32 divisors (see below), whose sum is σ = 105186151744960. Its totient is φ = 52111465426944.

The previous prime is 78528108308509. The next prime is 78528108308519. The reversal of 78528108308511 is 11580380182587.

It is not a de Polignac number, because 78528108308511 - 2¹ = 78528108308509 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 (78528108308519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5359175661 + ... + 5359190313.

It is an arithmetic number, because the mean of its divisors is an integer number (3287067242030).

Almost surely, 2^{78528108308511} is an apocalyptic number.

78528108308511 is a deficient number, since it is larger than the sum of its proper divisors (26658043436449).

78528108308511 is a wasteful number, since it uses less digits than its factorization.

78528108308511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20875.

The product of its (nonzero) digits is 4300800, while the sum is 57.

The spelling of 78528108308511 in words is "seventy-eight trillion, five hundred twenty-eight billion, one hundred eight million, three hundred eight thousand, five hundred eleven".