171603378416 has 20 divisors (see below), whose sum is σ = 333089389992. Its totient is φ = 85644826176.

The previous prime is 171603378413. The next prime is 171603378437. The reversal of 171603378416 is 614873306171.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171603378413) 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, 9794915 + ... + 9812418.

Almost surely, 2^171603378416 is an apocalyptic number.

171603378416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

171603378416 is a deficient number, since it is larger than the sum of its proper divisors (161486011576).

171603378416 is a wasteful number, since it uses less digits than its factorization.

171603378416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19607888 (or 19607882 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 171603378416 in words is "one hundred seventy-one billion, six hundred three million, three hundred seventy-eight thousand, four hundred sixteen".