78841600509 has 16 divisors (see below), whose sum is σ = 120426324480. Its totient is φ = 44944814640.

The previous prime is 78841600507. The next prime is 78841600529. The reversal of 78841600509 is 90500614887.

It is not a de Polignac number, because 78841600509 - 2¹ = 78841600507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78841600507) 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, 4471347 + ... + 4488944.

It is an arithmetic number, because the mean of its divisors is an integer number (7526645280).

Almost surely, 2^78841600509 is an apocalyptic number.

It is an amenable number.

78841600509 is a deficient number, since it is larger than the sum of its proper divisors (41584723971).

78841600509 is a wasteful number, since it uses less digits than its factorization.

78841600509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8960720.

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 78841600509 in words is "seventy-eight billion, eight hundred forty-one million, six hundred thousand, five hundred nine".