1438585448261 has 16 divisors (see below), whose sum is σ = 1561282060800. Its totient is φ = 1317619199808.

The previous prime is 1438585448239. The next prime is 1438585448273. The reversal of 1438585448261 is 1628445858341.

It is a cyclic number.

It is not a de Polignac number, because 1438585448261 - 2³⁸ = 1163707541317 is a prime.

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 1438585448261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438585448281) 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, 2952215 + ... + 3404811.

It is an arithmetic number, because the mean of its divisors is an integer number (97580128800).

Almost surely, 2^{1438585448261} is an apocalyptic number.

It is an amenable number.

1438585448261 is a deficient number, since it is larger than the sum of its proper divisors (122696612539).

1438585448261 is a wasteful number, since it uses less digits than its factorization.

1438585448261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454508.

The product of its digits is 29491200, while the sum is 59.

The spelling of 1438585448261 in words is "one trillion, four hundred thirty-eight billion, five hundred eighty-five million, four hundred forty-eight thousand, two hundred sixty-one".