13996640450 has 24 divisors (see below), whose sum is σ = 28036348788. Its totient is φ = 5167990080.

The previous prime is 13996640401. The next prime is 13996640459. The reversal of 13996640450 is 5404669931.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2818441921 + 11178198529 = 53089^2 + 105727^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13996640395 and 13996640404.

It is not an unprimeable number, because it can be changed into a prime (13996640459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10765997 + ... + 10767296.

Almost surely, 2^13996640450 is an apocalyptic number.

13996640450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13996640450 is an abundant number, since it is smaller than the sum of its proper divisors (14039708338).

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

13996640450 is a wasteful number, since it uses less digits than its factorization.

13996640450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21533318 (or 21533313 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 13996640450 in words is "thirteen billion, nine hundred ninety-six million, six hundred forty thousand, four hundred fifty".