145731765401 has 4 divisors (see below), whose sum is σ = 146164204212. Its totient is φ = 145299326592.

The previous prime is 145731765367. The next prime is 145731765407. The reversal of 145731765401 is 104567137541.

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 59976499801 + 85755265600 = 244901^2 + 292840^2 .

It is a cyclic number.

It is not a de Polignac number, because 145731765401 - 2¹⁰ = 145731764377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145731765407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216218900 + ... + 216219573.

It is an arithmetic number, because the mean of its divisors is an integer number (36541051053).

Almost surely, 2^145731765401 is an apocalyptic number.

It is an amenable number.

145731765401 is a deficient number, since it is larger than the sum of its proper divisors (432438811).

145731765401 is an equidigital number, since it uses as much as digits as its factorization.

145731765401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432438810.

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 145731765401 in words is "one hundred forty-five billion, seven hundred thirty-one million, seven hundred sixty-five thousand, four hundred one".