145062261661 has 4 divisors (see below), whose sum is σ = 147227370112. Its totient is φ = 142897153212.

The previous prime is 145062261649. The next prime is 145062261683. The reversal of 145062261661 is 166162260541.

145062261661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145062261661 - 2²³ = 145053873053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145062261061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1082554125 + ... + 1082554258.

It is an arithmetic number, because the mean of its divisors is an integer number (36806842528).

Almost surely, 2^145062261661 is an apocalyptic number.

It is an amenable number.

145062261661 is a deficient number, since it is larger than the sum of its proper divisors (2165108451).

145062261661 is an equidigital number, since it uses as much as digits as its factorization.

145062261661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165108450.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 145062261661 in words is "one hundred forty-five billion, sixty-two million, two hundred sixty-one thousand, six hundred sixty-one".