145121532999 has 16 divisors (see below), whose sum is σ = 205547971200. Its totient is φ = 90814823136.

The previous prime is 145121532989. The next prime is 145121533003. The reversal of 145121532999 is 999235121541.

It is a happy number.

It is not a de Polignac number, because 145121532999 - 2⁵ = 145121532967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145121532929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11672649 + ... + 11685074.

It is an arithmetic number, because the mean of its divisors is an integer number (12846748200).

Almost surely, 2^145121532999 is an apocalyptic number.

145121532999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

145121532999 is a deficient number, since it is larger than the sum of its proper divisors (60426438201).

145121532999 is a wasteful number, since it uses less digits than its factorization.

145121532999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23357854.

The product of its digits is 874800, while the sum is 51.

The spelling of 145121532999 in words is "one hundred forty-five billion, one hundred twenty-one million, five hundred thirty-two thousand, nine hundred ninety-nine".