145241436661 has 4 divisors (see below), whose sum is σ = 145256892352. Its totient is φ = 145225980972.

The previous prime is 145241436653. The next prime is 145241436701. The reversal of 145241436661 is 166634142541.

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, and also an emirpimes, since its reverse is a distinct semiprime: 166634142541 = 260363 ⋅640007.

It is a cyclic number.

It is not a de Polignac number, because 145241436661 - 2³ = 145241436653 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 (145241436761) 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, 7713741 + ... + 7732546.

It is an arithmetic number, because the mean of its divisors is an integer number (36314223088).

Almost surely, 2^145241436661 is an apocalyptic number.

It is an amenable number.

145241436661 is a deficient number, since it is larger than the sum of its proper divisors (15455691).

145241436661 is an equidigital number, since it uses as much as digits as its factorization.

145241436661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15455690.

The product of its digits is 414720, while the sum is 43.

The spelling of 145241436661 in words is "one hundred forty-five billion, two hundred forty-one million, four hundred thirty-six thousand, six hundred sixty-one".