13491051847 has 16 divisors (see below), whose sum is σ = 16725586752. Its totient is φ = 10596314880.

The previous prime is 13491051829. The next prime is 13491051857. The reversal of 13491051847 is 74815019431.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13491051847 - 2¹⁵ = 13491019079 is a prime.

It is a super-2 number, since 2×13491051847² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13491051857) 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, 528604 + ... + 553537.

It is an arithmetic number, because the mean of its divisors is an integer number (1045349172).

Almost surely, 2^13491051847 is an apocalyptic number.

13491051847 is a deficient number, since it is larger than the sum of its proper divisors (3234534905).

13491051847 is a wasteful number, since it uses less digits than its factorization.

13491051847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082298.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 13491051847 in words is "thirteen billion, four hundred ninety-one million, fifty-one thousand, eight hundred forty-seven".