149644582731 has 32 divisors (see below), whose sum is σ = 253416634880. Its totient is φ = 85494266208.

The previous prime is 149644582723. The next prime is 149644582739. The reversal of 149644582731 is 137285446941.

149644582731 is a `hidden beast` number, since 1 + 4 + 96 + 445 + 82 + 7 + 31 = 666.

It is an interprime number because it is at equal distance from previous prime (149644582723) and next prime (149644582739).

It is not a de Polignac number, because 149644582731 - 2³ = 149644582723 is a prime.

It is a super-2 number, since 2×149644582731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149644582739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 912165 + ... + 1063641.

It is an arithmetic number, because the mean of its divisors is an integer number (7919269840).

Almost surely, 2^149644582731 is an apocalyptic number.

149644582731 is a deficient number, since it is larger than the sum of its proper divisors (103772052149).

149644582731 is a wasteful number, since it uses less digits than its factorization.

149644582731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156720 (or 156714 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 149644582731 in words is "one hundred forty-nine billion, six hundred forty-four million, five hundred eighty-two thousand, seven hundred thirty-one".