145423521505 has 8 divisors (see below), whose sum is σ = 174560198400. Its totient is φ = 116304168816.

The previous prime is 145423521479. The next prime is 145423521511. The reversal of 145423521505 is 505125324541.

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 145423521505 - 2¹⁵ = 145423488737 is a prime.

It is a super-2 number, since 2×145423521505² (a number of 23 digits) contains 22 as substring.

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, 4312575 + ... + 4346164.

It is an arithmetic number, because the mean of its divisors is an integer number (21820024800).

Almost surely, 2^145423521505 is an apocalyptic number.

It is an amenable number.

145423521505 is a deficient number, since it is larger than the sum of its proper divisors (29136676895).

145423521505 is an equidigital number, since it uses as much as digits as its factorization.

145423521505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8662103.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 145423521505 in words is "one hundred forty-five billion, four hundred twenty-three million, five hundred twenty-one thousand, five hundred five".