12688201950 has 24 divisors (see below), whose sum is σ = 31466741208. Its totient is φ = 3383520480.

The previous prime is 12688201931. The next prime is 12688201969. The reversal of 12688201950 is 5910288621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12688201931) and next prime (12688201969).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42293857 + ... + 42294156.

It is an arithmetic number, because the mean of its divisors is an integer number (1311114217).

Almost surely, 2^12688201950 is an apocalyptic number.

12688201950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12688201950 is an abundant number, since it is smaller than the sum of its proper divisors (18778539258).

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

12688201950 is a wasteful number, since it uses less digits than its factorization.

12688201950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84588028 (or 84588023 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The spelling of 12688201950 in words is "twelve billion, six hundred eighty-eight million, two hundred one thousand, nine hundred fifty".