145916019 has 8 divisors (see below), whose sum is σ = 216171920. Its totient is φ = 97277328.

The previous prime is 145916009. The next prime is 145916021. The reversal of 145916019 is 910619541.

145916019 is a `hidden beast` number, since 1 + 4 + 591 + 60 + 1 + 9 = 666.

It is not a de Polignac number, because 145916019 - 2⁴ = 145916003 is a prime.

It is a super-2 number, since 2×145916019² = 42582969201616722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145916009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2702122 + ... + 2702175.

It is an arithmetic number, because the mean of its divisors is an integer number (27021490).

Almost surely, 2^145916019 is an apocalyptic number.

145916019 is a deficient number, since it is larger than the sum of its proper divisors (70255901).

145916019 is an equidigital number, since it uses as much as digits as its factorization.

145916019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5404306 (or 5404300 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 145916019 is about 12079.5703152058. The cubic root of 145916019 is about 526.4627614672.

The spelling of 145916019 in words is "one hundred forty-five million, nine hundred sixteen thousand, nineteen".