153845213491 has 4 divisors (see below), whose sum is σ = 158003192272. Its totient is φ = 149687234712.

The previous prime is 153845213477. The next prime is 153845213537. The reversal of 153845213491 is 194312548351.

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 153845213491 - 2³³ = 145255278899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153845213461) 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, 2078989335 + ... + 2078989408.

It is an arithmetic number, because the mean of its divisors is an integer number (39500798068).

Almost surely, 2^153845213491 is an apocalyptic number.

153845213491 is a deficient number, since it is larger than the sum of its proper divisors (4157978781).

153845213491 is an equidigital number, since it uses as much as digits as its factorization.

153845213491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4157978780.

The product of its digits is 518400, while the sum is 46.

The spelling of 153845213491 in words is "one hundred fifty-three billion, eight hundred forty-five million, two hundred thirteen thousand, four hundred ninety-one".