145421544451 has 8 divisors (see below), whose sum is σ = 145729967040. Its totient is φ = 145113329448.

The previous prime is 145421544421. The next prime is 145421544473. The reversal of 145421544451 is 154445124541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145421544451 - 2¹⁹ = 145421020163 is a prime.

It is a super-2 number, since 2×145421544451² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145421544421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1393060 + ... + 1493806.

It is an arithmetic number, because the mean of its divisors is an integer number (18216245880).

Almost surely, 2^145421544451 is an apocalyptic number.

145421544451 is a deficient number, since it is larger than the sum of its proper divisors (308422589).

145421544451 is a wasteful number, since it uses less digits than its factorization.

145421544451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103793.

The product of its digits is 256000, while the sum is 40.

Adding to 145421544451 its reverse (154445124541), we get a palindrome (299866668992).

The spelling of 145421544451 in words is "one hundred forty-five billion, four hundred twenty-one million, five hundred forty-four thousand, four hundred fifty-one".