12495343878 has 16 divisors (see below), whose sum is σ = 27767430960. Its totient is φ = 4165114608.

The previous prime is 12495343877. The next prime is 12495343891. The reversal of 12495343878 is 87834359421.

It is a happy number.

12495343878 is a `hidden beast` number, since 1 + 2 + 4 + 9 + 534 + 38 + 78 = 666.

It is a super-2 number, since 2×12495343878² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 231395257 = 12495343878 / (1 + 2 + 4 + 9 + 5 + 3 + 4 + 3 + 8 + 7 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12495343871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115697575 + ... + 115697682.

It is an arithmetic number, because the mean of its divisors is an integer number (1735464435).

Almost surely, 2^12495343878 is an apocalyptic number.

12495343878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12495343878 is an abundant number, since it is smaller than the sum of its proper divisors (15272087082).

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

12495343878 is a wasteful number, since it uses less digits than its factorization.

12495343878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231395268 (or 231395262 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 12495343878 in words is "twelve billion, four hundred ninety-five million, three hundred forty-three thousand, eight hundred seventy-eight".