12699776450 has 24 divisors (see below), whose sum is σ = 23698556112. Its totient is φ = 5063357520.

The previous prime is 12699776443. The next prime is 12699776513. The reversal of 12699776450 is 5467799621.

It is a super-3 number, since 3×12699776450³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 398324 + ... + 429023.

It is an arithmetic number, because the mean of its divisors is an integer number (987439838).

Almost surely, 2^12699776450 is an apocalyptic number.

12699776450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12699776450 is a deficient number, since it is larger than the sum of its proper divisors (10998779662).

12699776450 is a wasteful number, since it uses less digits than its factorization.

12699776450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827666 (or 827661 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 56.

The spelling of 12699776450 in words is "twelve billion, six hundred ninety-nine million, seven hundred seventy-six thousand, four hundred fifty".