172354694378 has 16 divisors (see below), whose sum is σ = 273747642120. Its totient is φ = 81105770496.

The previous prime is 172354694377. The next prime is 172354694417. The reversal of 172354694378 is 873496453271.

It can be written as a sum of positive squares in 4 ways, for example, as 151365349249 + 20989345129 = 389057^2 + 144877^2 .

It is a super-2 number, since 2×172354694378² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172354694377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1952378 + ... + 2038746.

Almost surely, 2^172354694378 is an apocalyptic number.

172354694378 is a deficient number, since it is larger than the sum of its proper divisors (101392947742).

172354694378 is a wasteful number, since it uses less digits than its factorization.

172354694378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145081.

The product of its digits is 30481920, while the sum is 59.

The spelling of 172354694378 in words is "one hundred seventy-two billion, three hundred fifty-four million, six hundred ninety-four thousand, three hundred seventy-eight".