172420710424 has 16 divisors (see below), whose sum is σ = 325458558000. Its totient is φ = 85631761632.

The previous prime is 172420710383. The next prime is 172420710439. The reversal of 172420710424 is 424017024271.

It is a self number, because there is not a number n which added to its sum of digits gives 172420710424.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72322932 + ... + 72325315.

It is an arithmetic number, because the mean of its divisors is an integer number (20341159875).

Almost surely, 2^172420710424 is an apocalyptic number.

It is an amenable number.

172420710424 is a deficient number, since it is larger than the sum of its proper divisors (153037847576).

172420710424 is a wasteful number, since it uses less digits than its factorization.

172420710424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144648402 (or 144648398 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 34.

Adding to 172420710424 its reverse (424017024271), we get a palindrome (596437734695).

The spelling of 172420710424 in words is "one hundred seventy-two billion, four hundred twenty million, seven hundred ten thousand, four hundred twenty-four".