1281117605654 has 16 divisors (see below), whose sum is σ = 1949634318336. Its totient is φ = 631306305000.

The previous prime is 1281117605653. The next prime is 1281117605683. The reversal of 1281117605654 is 4565067111821.

It is a junction number, because it is equal to n+sod(n) for n = 1281117605599 and 1281117605608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281117605653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16662872 + ... + 16739579.

It is an arithmetic number, because the mean of its divisors is an integer number (121852144896).

Almost surely, 2^{1281117605654} is an apocalyptic number.

1281117605654 is a deficient number, since it is larger than the sum of its proper divisors (668516712682).

1281117605654 is a wasteful number, since it uses less digits than its factorization.

1281117605654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33402731.

The product of its (nonzero) digits is 403200, while the sum is 47.

The spelling of 1281117605654 in words is "one trillion, two hundred eighty-one billion, one hundred seventeen million, six hundred five thousand, six hundred fifty-four".