17478261913 has 32 divisors (see below), whose sum is σ = 21274030080. Its totient is φ = 14036742720.

The previous prime is 17478261887. The next prime is 17478261919. The reversal of 17478261913 is 31916287471.

It is not a de Polignac number, because 17478261913 - 2¹³ = 17478253721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17478261919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1789798 + ... + 1799536.

It is an arithmetic number, because the mean of its divisors is an integer number (664813440).

Almost surely, 2^17478261913 is an apocalyptic number.

It is an amenable number.

17478261913 is a deficient number, since it is larger than the sum of its proper divisors (3795768167).

17478261913 is a wasteful number, since it uses less digits than its factorization.

17478261913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9997.

The product of its digits is 508032, while the sum is 49.

The spelling of 17478261913 in words is "seventeen billion, four hundred seventy-eight million, two hundred sixty-one thousand, nine hundred thirteen".