78513805907 has 16 divisors (see below), whose sum is σ = 84892341600. Its totient is φ = 72341237760.

The previous prime is 78513805901. The next prime is 78513805913. The reversal of 78513805907 is 70950831587.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78513805901) and next prime (78513805913).

It is a cyclic number.

It is not a de Polignac number, because 78513805907 - 2¹⁰ = 78513804883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78513805901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79319 + ... + 404127.

It is an arithmetic number, because the mean of its divisors is an integer number (5305771350).

Almost surely, 2^78513805907 is an apocalyptic number.

78513805907 is a deficient number, since it is larger than the sum of its proper divisors (6378535693).

78513805907 is a wasteful number, since it uses less digits than its factorization.

78513805907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325126.

The product of its (nonzero) digits is 2116800, while the sum is 53.

The spelling of 78513805907 in words is "seventy-eight billion, five hundred thirteen million, eight hundred five thousand, nine hundred seven".