12798780855 has 32 divisors (see below), whose sum is σ = 24635251200. Its totient is φ = 5542929792.

The previous prime is 12798780833. The next prime is 12798780877. The reversal of 12798780855 is 55808789721.

It is an interprime number because it is at equal distance from previous prime (12798780833) and next prime (12798780877).

It is not a de Polignac number, because 12798780855 - 2⁵ = 12798780823 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3205720 + ... + 3209709.

It is an arithmetic number, because the mean of its divisors is an integer number (769851600).

Almost surely, 2^12798780855 is an apocalyptic number.

12798780855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12798780855 is a deficient number, since it is larger than the sum of its proper divisors (11836470345).

12798780855 is a wasteful number, since it uses less digits than its factorization.

12798780855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6415463.

The product of its (nonzero) digits is 11289600, while the sum is 60.

The spelling of 12798780855 in words is "twelve billion, seven hundred ninety-eight million, seven hundred eighty thousand, eight hundred fifty-five".