12598550778 has 32 divisors (see below), whose sum is σ = 27500824512. Its totient is φ = 3815926400.

The previous prime is 12598550777. The next prime is 12598550813. The reversal of 12598550778 is 87705589521.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12598550773) 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, 97768 + ... + 186428.

It is an arithmetic number, because the mean of its divisors is an integer number (859400766).

Almost surely, 2^12598550778 is an apocalyptic number.

12598550778 is an abundant number, since it is smaller than the sum of its proper divisors (14902273734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12598550778 is a wasteful number, since it uses less digits than its factorization.

12598550778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90830.

The product of its (nonzero) digits is 7056000, while the sum is 57.

The spelling of 12598550778 in words is "twelve billion, five hundred ninety-eight million, five hundred fifty thousand, seven hundred seventy-eight".