145561133501 has 4 divisors (see below), whose sum is σ = 166355581152. Its totient is φ = 124766685852.

The previous prime is 145561133467. The next prime is 145561133527. The reversal of 145561133501 is 105331165541.

145561133501 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, and also an emirpimes, since its reverse is a distinct semiprime: 105331165541 = 7 ⋅15047309363.

It is a cyclic number.

It is not a de Polignac number, because 145561133501 - 2¹⁰ = 145561132477 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 (145561133561) 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, 10397223815 + ... + 10397223828.

It is an arithmetic number, because the mean of its divisors is an integer number (41588895288).

Almost surely, 2^145561133501 is an apocalyptic number.

It is an amenable number.

145561133501 is a deficient number, since it is larger than the sum of its proper divisors (20794447651).

145561133501 is an equidigital number, since it uses as much as digits as its factorization.

145561133501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20794447650.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 145561133501 in words is "one hundred forty-five billion, five hundred sixty-one million, one hundred thirty-three thousand, five hundred one".