1581319272255 has 16 divisors (see below), whose sum is σ = 2611727314944. Its totient is φ = 816164785440.

The previous prime is 1581319272229. The next prime is 1581319272289. The reversal of 1581319272255 is 5522729131851.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1581319272255 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1581319272198 and 1581319272207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1700342839 + ... + 1700343768.

It is an arithmetic number, because the mean of its divisors is an integer number (163232957184).

Almost surely, 2^{1581319272255} is an apocalyptic number.

1581319272255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1581319272255 is a deficient number, since it is larger than the sum of its proper divisors (1030408042689).

1581319272255 is a wasteful number, since it uses less digits than its factorization.

1581319272255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400686646.

The product of its digits is 1512000, while the sum is 51.

The spelling of 1581319272255 in words is "one trillion, five hundred eighty-one billion, three hundred nineteen million, two hundred seventy-two thousand, two hundred fifty-five".