145442647323172 has 24 divisors (see below), whose sum is σ = 254749234463360. Its totient is φ = 72657177564960.

The previous prime is 145442647323151. The next prime is 145442647323199. The reversal of 145442647323172 is 271323746244541.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19341397 + ... + 25787107.

Almost surely, 2^{145442647323172} is an apocalyptic number.

It is an amenable number.

145442647323172 is a deficient number, since it is larger than the sum of its proper divisors (109306587140188).

145442647323172 is a wasteful number, since it uses less digits than its factorization.

145442647323172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6450691 (or 6450689 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 55.

The spelling of 145442647323172 in words is "one hundred forty-five trillion, four hundred forty-two billion, six hundred forty-seven million, three hundred twenty-three thousand, one hundred seventy-two".