12699669840 has 640 divisors, whose sum is σ = 48503895552. Its totient is φ = 2707292160.

The previous prime is 12699669833. The next prime is 12699669859. The reversal of 12699669840 is 4896699621.

It is a super-2 number, since 2×12699669840² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 92698252 + ... + 92698388.

Almost surely, 2^12699669840 is an apocalyptic number.

12699669840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12699669840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24251947776).

12699669840 is an abundant number, since it is smaller than the sum of its proper divisors (35804225712).

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

12699669840 is a wasteful number, since it uses less digits than its factorization.

12699669840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 60.

The spelling of 12699669840 in words is "twelve billion, six hundred ninety-nine million, six hundred sixty-nine thousand, eight hundred forty".