15940163800881 has 12 divisors (see below), whose sum is σ = 23024760047952. Its totient is φ = 10626739404696.

The previous prime is 15940163800853. The next prime is 15940163800919. The reversal of 15940163800881 is 18800836104951.

It is a happy number.

15940163800881 is a `hidden beast` number, since 1 + 594 + 0 + 16 + 38 + 0 + 0 + 8 + 8 + 1 = 666.

It is not a de Polignac number, because 15940163800881 - 2⁶ = 15940163800817 is a prime.

It is a super-2 number, since 2×15940163800881² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15940163800811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122551 + ... + 5647596.

It is an arithmetic number, because the mean of its divisors is an integer number (1918730003996).

Almost surely, 2^{15940163800881} is an apocalyptic number.

It is an amenable number.

15940163800881 is a deficient number, since it is larger than the sum of its proper divisors (7084596247071).

15940163800881 is a wasteful number, since it uses less digits than its factorization.

15940163800881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6077100 (or 6077097 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 54.

The spelling of 15940163800881 in words is "fifteen trillion, nine hundred forty billion, one hundred sixty-three million, eight hundred thousand, eight hundred eighty-one".