263004285981 has 16 divisors (see below), whose sum is σ = 351668022464. Its totient is φ = 174839019264.

The previous prime is 263004285959. The next prime is 263004286021. The reversal of 263004285981 is 189582400362.

It is not a de Polignac number, because 263004285981 - 2¹¹ = 263004283933 is a prime.

It is a super-2 number, since 2×263004285981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 263004285981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263004285911) 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, 1555701 + ... + 1716453.

It is an arithmetic number, because the mean of its divisors is an integer number (21979251404).

Almost surely, 2^263004285981 is an apocalyptic number.

It is an amenable number.

263004285981 is a deficient number, since it is larger than the sum of its proper divisors (88663736483).

263004285981 is a wasteful number, since it uses less digits than its factorization.

263004285981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162300.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 263004285981 in words is "two hundred sixty-three billion, four million, two hundred eighty-five thousand, nine hundred eighty-one".