13849491509 has 8 divisors (see below), whose sum is σ = 15848795328. Its totient is φ = 11855388960.

The previous prime is 13849491463. The next prime is 13849491527. The reversal of 13849491509 is 90519494831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13849491509 - 2²⁴ = 13832714293 is a prime.

It is a super-4 number, since 4×13849491509⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13849491559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1294607 + ... + 1305260.

It is an arithmetic number, because the mean of its divisors is an integer number (1981099416).

Almost surely, 2^13849491509 is an apocalyptic number.

It is an amenable number.

13849491509 is a deficient number, since it is larger than the sum of its proper divisors (1999303819).

13849491509 is an equidigital number, since it uses as much as digits as its factorization.

13849491509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600635.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 13849491509 in words is "thirteen billion, eight hundred forty-nine million, four hundred ninety-one thousand, five hundred nine".