145242733717 has 4 divisors (see below), whose sum is σ = 145365096096. Its totient is φ = 145120371340.

The previous prime is 145242733703. The next prime is 145242733721. The reversal of 145242733717 is 717337242541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145242733717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145242733747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61179409 + ... + 61181782.

It is an arithmetic number, because the mean of its divisors is an integer number (36341274024).

Almost surely, 2^145242733717 is an apocalyptic number.

It is an amenable number.

145242733717 is a deficient number, since it is larger than the sum of its proper divisors (122362379).

145242733717 is a wasteful number, since it uses less digits than its factorization.

145242733717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122362378.

The product of its digits is 987840, while the sum is 46.

The spelling of 145242733717 in words is "one hundred forty-five billion, two hundred forty-two million, seven hundred thirty-three thousand, seven hundred seventeen".