145509011 has 4 divisors (see below), whose sum is σ = 153167400. Its totient is φ = 137850624.

The previous prime is 145508989. The next prime is 145509019. The reversal of 145509011 is 110905541.

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

It is a de Polignac number, because none of the positive numbers 2^k-145509011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145509019) 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, 3829166 + ... + 3829203.

It is an arithmetic number, because the mean of its divisors is an integer number (38291850).

Almost surely, 2^145509011 is an apocalyptic number.

145509011 is a deficient number, since it is larger than the sum of its proper divisors (7658389).

145509011 is an equidigital number, since it uses as much as digits as its factorization.

145509011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7658388.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 145509011 is about 12062.7115939991. The cubic root of 145509011 is about 525.9728127649.

The spelling of 145509011 in words is "one hundred forty-five million, five hundred nine thousand, eleven".