13640403025 has 24 divisors (see below), whose sum is σ = 17904300480. Its totient is φ = 10290987840.

The previous prime is 13640402983. The next prime is 13640403071. The reversal of 13640403025 is 52030404631.

It is not a de Polignac number, because 13640403025 - 2¹⁹ = 13639878737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13640402984 and 13640403002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187597 + ... + 249946.

It is an arithmetic number, because the mean of its divisors is an integer number (746012520).

Almost surely, 2^13640403025 is an apocalyptic number.

It is an amenable number.

13640403025 is a deficient number, since it is larger than the sum of its proper divisors (4263897455).

13640403025 is a wasteful number, since it uses less digits than its factorization.

13640403025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437625 (or 437620 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 13640403025 its reverse (52030404631), we get a palindrome (65670807656).

The spelling of 13640403025 in words is "thirteen billion, six hundred forty million, four hundred three thousand, twenty-five".