148785998591 has 4 divisors (see below), whose sum is σ = 151225113384. Its totient is φ = 146346883800.

The previous prime is 148785998579. The next prime is 148785998623. The reversal of 148785998591 is 195899587841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195899587841 = 439 ⋅446240519.

It is a cyclic number.

It is not a de Polignac number, because 148785998591 - 2¹⁴ = 148785982207 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 (148785991591) 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, 1219557305 + ... + 1219557426.

It is an arithmetic number, because the mean of its divisors is an integer number (37806278346).

Almost surely, 2^148785998591 is an apocalyptic number.

148785998591 is a deficient number, since it is larger than the sum of its proper divisors (2439114793).

148785998591 is an equidigital number, since it uses as much as digits as its factorization.

148785998591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439114792.

The product of its digits is 261273600, while the sum is 74.

The spelling of 148785998591 in words is "one hundred forty-eight billion, seven hundred eighty-five million, nine hundred ninety-eight thousand, five hundred ninety-one".