172352420442 has 24 divisors (see below), whose sum is σ = 373629268116. Its totient is φ = 57420187776.

The previous prime is 172352420423. The next prime is 172352420459. The reversal of 172352420442 is 244024253271.

172352420442 is a `hidden beast` number, since 1 + 72 + 3 + 524 + 20 + 4 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 166251092121 + 6101328321 = 407739^2 + 78111^2 .

It is a junction number, because it is equal to n+sod(n) for n = 172352420397 and 172352420406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2516863 + ... + 2584434.

Almost surely, 2^172352420442 is an apocalyptic number.

172352420442 is an abundant number, since it is smaller than the sum of its proper divisors (201276847674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172352420442 is a wasteful number, since it uses less digits than its factorization.

172352420442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103182 (or 5103179 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 36.

The spelling of 172352420442 in words is "one hundred seventy-two billion, three hundred fifty-two million, four hundred twenty thousand, four hundred forty-two".