145940280565 has 4 divisors (see below), whose sum is σ = 175128336684. Its totient is φ = 116752224448.

The previous prime is 145940280529. The next prime is 145940280583. The reversal of 145940280565 is 565082049541.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16150851396 + 129789429169 = 127086^2 + 360263^2 .

It is a cyclic number.

It is not a de Polignac number, because 145940280565 - 2²³ = 145931891957 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14594028052 + ... + 14594028061.

It is an arithmetic number, because the mean of its divisors is an integer number (43782084171).

Almost surely, 2^145940280565 is an apocalyptic number.

It is an amenable number.

145940280565 is a deficient number, since it is larger than the sum of its proper divisors (29188056119).

145940280565 is an equidigital number, since it uses as much as digits as its factorization.

145940280565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29188056118.

The product of its (nonzero) digits is 1728000, while the sum is 49.

The spelling of 145940280565 in words is "one hundred forty-five billion, nine hundred forty million, two hundred eighty thousand, five hundred sixty-five".