13665520250 has 64 divisors (see below), whose sum is σ = 26205603840. Its totient is φ = 5333644800.

The previous prime is 13665520243. The next prime is 13665520259. The reversal of 13665520250 is 5202556631.

It is a self number, because there is not a number n which added to its sum of digits gives 13665520250.

It is not an unprimeable number, because it can be changed into a prime (13665520259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4310666 + ... + 4313834.

It is an arithmetic number, because the mean of its divisors is an integer number (409462560).

Almost surely, 2^13665520250 is an apocalyptic number.

13665520250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13665520250 is a deficient number, since it is larger than the sum of its proper divisors (12540083590).

13665520250 is a wasteful number, since it uses less digits than its factorization.

13665520250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3600 (or 3590 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 13665520250 in words is "thirteen billion, six hundred sixty-five million, five hundred twenty thousand, two hundred fifty".