13649515867 has 4 divisors (see below), whose sum is σ = 14699478640. Its totient is φ = 12599553096.

The previous prime is 13649515823. The next prime is 13649515879. The reversal of 13649515867 is 76851594631.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13649515867 - 2⁷ = 13649515739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13649519867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524981367 + ... + 524981392.

It is an arithmetic number, because the mean of its divisors is an integer number (3674869660).

Almost surely, 2^13649515867 is an apocalyptic number.

13649515867 is a deficient number, since it is larger than the sum of its proper divisors (1049962773).

13649515867 is a wasteful number, since it uses less digits than its factorization.

13649515867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049962772.

The product of its digits is 5443200, while the sum is 55.

The spelling of 13649515867 in words is "thirteen billion, six hundred forty-nine million, five hundred fifteen thousand, eight hundred sixty-seven".