172078072132 has 24 divisors (see below), whose sum is σ = 303388364160. Its totient is φ = 85396889760.

The previous prime is 172078072121. The next prime is 172078072193. The reversal of 172078072132 is 231270870271.

It is a super-2 number, since 2×172078072132² (a number of 23 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 421719 + ... + 722497.

It is an arithmetic number, because the mean of its divisors is an integer number (12641181840).

Almost surely, 2^172078072132 is an apocalyptic number.

It is an amenable number.

172078072132 is a deficient number, since it is larger than the sum of its proper divisors (131310292028).

172078072132 is a wasteful number, since it uses less digits than its factorization.

172078072132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301851 (or 301849 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 40.

The spelling of 172078072132 in words is "one hundred seventy-two billion, seventy-eight million, seventy-two thousand, one hundred thirty-two".