172516313403 has 16 divisors (see below), whose sum is σ = 292091112960. Its totient is φ = 98580750408.

The previous prime is 172516313369. The next prime is 172516313447. The reversal of 172516313403 is 304313615271.

172516313403 is a `hidden beast` number, since 1 + 7 + 2 + 516 + 3 + 134 + 0 + 3 = 666.

It is not a de Polignac number, because 172516313403 - 2²⁰ = 172515264827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172616313403) 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, 456392175 + ... + 456392552.

It is an arithmetic number, because the mean of its divisors is an integer number (18255694560).

Almost surely, 2^172516313403 is an apocalyptic number.

172516313403 is a deficient number, since it is larger than the sum of its proper divisors (119574799557).

172516313403 is an equidigital number, since it uses as much as digits as its factorization.

172516313403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912784743 (or 912784737 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

Adding to 172516313403 its reverse (304313615271), we get a palindrome (476829928674).

The spelling of 172516313403 in words is "one hundred seventy-two billion, five hundred sixteen million, three hundred thirteen thousand, four hundred three".