145541645551 has 4 divisors (see below), whose sum is σ = 145589195704. Its totient is φ = 145494095400.

The previous prime is 145541645527. The next prime is 145541645591. The reversal of 145541645551 is 155546145541.

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

It is a cyclic number.

It is not a de Polignac number, because 145541645551 - 2¹³ = 145541637359 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 (145541645591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23770485 + ... + 23776606.

It is an arithmetic number, because the mean of its divisors is an integer number (36397298926).

Almost surely, 2^145541645551 is an apocalyptic number.

145541645551 is a deficient number, since it is larger than the sum of its proper divisors (47550153).

145541645551 is an equidigital number, since it uses as much as digits as its factorization.

145541645551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47550152.

The product of its digits is 1200000, while the sum is 46.

The spelling of 145541645551 in words is "one hundred forty-five billion, five hundred forty-one million, six hundred forty-five thousand, five hundred fifty-one".