149824399681 has 16 divisors (see below), whose sum is σ = 169931059200. Its totient is φ = 130862005200.

The previous prime is 149824399651. The next prime is 149824399717. The reversal of 149824399681 is 186993428941.

It is a cyclic number.

It is not a de Polignac number, because 149824399681 - 2⁵ = 149824399649 is a prime.

It is a super-2 number, since 2×149824399681² (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 (149824399651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1533061 + ... + 1627858.

It is an arithmetic number, because the mean of its divisors is an integer number (10620691200).

Almost surely, 2^149824399681 is an apocalyptic number.

149824399681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

149824399681 is a deficient number, since it is larger than the sum of its proper divisors (20106659519).

149824399681 is a wasteful number, since it uses less digits than its factorization.

149824399681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3161100.

The product of its digits is 26873856, while the sum is 64.

The spelling of 149824399681 in words is "one hundred forty-nine billion, eight hundred twenty-four million, three hundred ninety-nine thousand, six hundred eighty-one".