13649257026 has 96 divisors (see below), whose sum is σ = 31577914368. Its totient is φ = 4416204240.

The previous prime is 13649256991. The next prime is 13649257033. The reversal of 13649257026 is 62075294631.

13649257026 is a `hidden beast` number, since 1 + 36 + 49 + 2 + 570 + 2 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3488011 + ... + 3491921.

It is an arithmetic number, because the mean of its divisors is an integer number (328936608).

Almost surely, 2^13649257026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13649257026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15788957184).

13649257026 is an abundant number, since it is smaller than the sum of its proper divisors (17928657342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13649257026 is a wasteful number, since it uses less digits than its factorization.

13649257026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138 (or 4126 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 13649257026 in words is "thirteen billion, six hundred forty-nine million, two hundred fifty-seven thousand, twenty-six".