78520462507 has 4 divisors (see below), whose sum is σ = 78522389536. Its totient is φ = 78518535480.

The previous prime is 78520462487. The next prime is 78520462541. The reversal of 78520462507 is 70526402587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70526402587 = 189853 ⋅371479.

It is a cyclic number.

It is not a de Polignac number, because 78520462507 - 2¹⁵ = 78520429739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78520462547) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 901044 + ... + 984337.

It is an arithmetic number, because the mean of its divisors is an integer number (19630597384).

Almost surely, 2^78520462507 is an apocalyptic number.

78520462507 is a deficient number, since it is larger than the sum of its proper divisors (1927029).

78520462507 is a wasteful number, since it uses less digits than its factorization.

78520462507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927028.

The product of its (nonzero) digits is 940800, while the sum is 46.

The spelling of 78520462507 in words is "seventy-eight billion, five hundred twenty million, four hundred sixty-two thousand, five hundred seven".