13640542365 has 64 divisors (see below), whose sum is σ = 23544483840. Its totient is φ = 6718817280.

The previous prime is 13640542337. The next prime is 13640542373. The reversal of 13640542365 is 56324504631.

It is not a de Polignac number, because 13640542365 - 2¹² = 13640538269 is a prime.

It is a super-2 number, since 2×13640542365² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4108176 + ... + 4111494.

It is an arithmetic number, because the mean of its divisors is an integer number (367882560).

Almost surely, 2^13640542365 is an apocalyptic number.

13640542365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13640542365 is a deficient number, since it is larger than the sum of its proper divisors (9903941475).

13640542365 is a wasteful number, since it uses less digits than its factorization.

13640542365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642.

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 13640542365 in words is "thirteen billion, six hundred forty million, five hundred forty-two thousand, three hundred sixty-five".