51881165112563 has 16 divisors (see below), whose sum is σ = 56511119923200. Its totient is φ = 47485038152640.

The previous prime is 51881165112559. The next prime is 51881165112593. The reversal of 51881165112563 is 36521156118815.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51881165112563 - 2² = 51881165112559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51881165112593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408726473 + ... + 408853386.

It is an arithmetic number, because the mean of its divisors is an integer number (3531944995200).

Almost surely, 2^{51881165112563} is an apocalyptic number.

51881165112563 is a deficient number, since it is larger than the sum of its proper divisors (4629954810637).

51881165112563 is a wasteful number, since it uses less digits than its factorization.

51881165112563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817580002.

The product of its digits is 1728000, while the sum is 53.

The spelling of 51881165112563 in words is "fifty-one trillion, eight hundred eighty-one billion, one hundred sixty-five million, one hundred twelve thousand, five hundred sixty-three".