145558273442 has 4 divisors (see below), whose sum is σ = 218337410166. Its totient is φ = 72779136720.

The previous prime is 145558273439. The next prime is 145558273447. The reversal of 145558273442 is 244372855541.

It is a Cunningham number, because it is equal to 381521²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 145558273441 + 1 = 381521^2 + 1^2 .

It is not an unprimeable number, because it can be changed into a prime (145558273447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36389568359 + ... + 36389568362.

Almost surely, 2^145558273442 is an apocalyptic number.

145558273442 is a deficient number, since it is larger than the sum of its proper divisors (72779136724).

145558273442 is an equidigital number, since it uses as much as digits as its factorization.

145558273442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72779136723.

The product of its digits is 5376000, while the sum is 50.

The spelling of 145558273442 in words is "one hundred forty-five billion, five hundred fifty-eight million, two hundred seventy-three thousand, four hundred forty-two".