15154340439681 has 12 divisors (see below), whose sum is σ = 21889637458000. Its totient is φ = 10102877656920.

The previous prime is 15154340439649. The next prime is 15154340439757. The reversal of 15154340439681 is 18693404345151.

15154340439681 is a `hidden beast` number, since 1 + 5 + 1 + 5 + 434 + 0 + 43 + 96 + 81 = 666.

It is not a de Polignac number, because 15154340439681 - 2⁵ = 15154340439649 is a prime.

It is a super-2 number, since 2×15154340439681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15150340439681) 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 11 ways as a sum of consecutive naturals, for example, 8506446 + ... + 10132536.

Almost surely, 2^{15154340439681} is an apocalyptic number.

It is an amenable number.

15154340439681 is a deficient number, since it is larger than the sum of its proper divisors (6735297018319).

15154340439681 is a wasteful number, since it uses less digits than its factorization.

15154340439681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661596 (or 2661593 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 15154340439681 in words is "fifteen trillion, one hundred fifty-four billion, three hundred forty million, four hundred thirty-nine thousand, six hundred eighty-one".