13499500561 has 16 divisors (see below), whose sum is σ = 14428022400. Its totient is φ = 12602988288.

The previous prime is 13499500559. The next prime is 13499500583. The reversal of 13499500561 is 16500599431.

It is a cyclic number.

It is not a de Polignac number, because 13499500561 - 2¹ = 13499500559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13499500541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127785 + ... + 208153.

It is an arithmetic number, because the mean of its divisors is an integer number (901751400).

Almost surely, 2^13499500561 is an apocalyptic number.

It is an amenable number.

13499500561 is a deficient number, since it is larger than the sum of its proper divisors (928521839).

13499500561 is a wasteful number, since it uses less digits than its factorization.

13499500561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80568.

The product of its (nonzero) digits is 145800, while the sum is 43.

The spelling of 13499500561 in words is "thirteen billion, four hundred ninety-nine million, five hundred thousand, five hundred sixty-one".