148011995591 has 4 divisors (see below), whose sum is σ = 148041799632. Its totient is φ = 147982191552.

The previous prime is 148011995581. The next prime is 148011995633. The reversal of 148011995591 is 195599110841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195599110841 = 23 ⋅8504309167.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148011995591 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 (148011995581) 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, 14894570 + ... + 14904503.

It is an arithmetic number, because the mean of its divisors is an integer number (37010449908).

Almost surely, 2^148011995591 is an apocalyptic number.

148011995591 is a deficient number, since it is larger than the sum of its proper divisors (29804041).

148011995591 is an equidigital number, since it uses as much as digits as its factorization.

148011995591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29804040.

The product of its (nonzero) digits is 583200, while the sum is 53.

The spelling of 148011995591 in words is "one hundred forty-eight billion, eleven million, nine hundred ninety-five thousand, five hundred ninety-one".