148561571447 has 4 divisors (see below), whose sum is σ = 149265654936. Its totient is φ = 147857487960.

The previous prime is 148561571441. The next prime is 148561571449. The reversal of 148561571447 is 744175165841.

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 148561571447 - 2⁶ = 148561571383 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 (148561571441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352041428 + ... + 352041849.

It is an arithmetic number, because the mean of its divisors is an integer number (37316413734).

Almost surely, 2^148561571447 is an apocalyptic number.

148561571447 is a deficient number, since it is larger than the sum of its proper divisors (704083489).

148561571447 is an equidigital number, since it uses as much as digits as its factorization.

148561571447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704083488.

The product of its digits is 3763200, while the sum is 53.

The spelling of 148561571447 in words is "one hundred forty-eight billion, five hundred sixty-one million, five hundred seventy-one thousand, four hundred forty-seven".