149871725831 has 4 divisors (see below), whose sum is σ = 154706297664. Its totient is φ = 145037154000.

The previous prime is 149871725813. The next prime is 149871725869. The reversal of 149871725831 is 138527178941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138527178941 = 162553 ⋅852197.

It is a cyclic number.

It is not a de Polignac number, because 149871725831 - 2¹⁴ = 149871709447 is a prime.

It is a super-2 number, since 2×149871725831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149871725881) 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, 2417285870 + ... + 2417285931.

It is an arithmetic number, because the mean of its divisors is an integer number (38676574416).

Almost surely, 2^149871725831 is an apocalyptic number.

149871725831 is a deficient number, since it is larger than the sum of its proper divisors (4834571833).

149871725831 is an equidigital number, since it uses as much as digits as its factorization.

149871725831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4834571832.

The product of its digits is 3386880, while the sum is 56.

The spelling of 149871725831 in words is "one hundred forty-nine billion, eight hundred seventy-one million, seven hundred twenty-five thousand, eight hundred thirty-one".