1604144261461 has 10 divisors (see below), whose sum is σ = 1871390288662. Its totient is φ = 1374980793480.

The previous prime is 1604144261459. The next prime is 1604144261483. The reversal of 1604144261461 is 1641624414061.

It can be written as a sum of positive squares in only one way, i.e., 1521102888900 + 83041372561 = 1233330^2 + 288169^2 .

It is not a de Polignac number, because 1604144261461 - 2¹ = 1604144261459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604144265461) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 334055130 + ... + 334059931.

Almost surely, 2^{1604144261461} is an apocalyptic number.

It is an amenable number.

1604144261461 is a deficient number, since it is larger than the sum of its proper divisors (267246027201).

1604144261461 is an frugal number, since it uses more digits than its factorization.

1604144261461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668115089 (or 668115068 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 1604144261461 in words is "one trillion, six hundred four billion, one hundred forty-four million, two hundred sixty-one thousand, four hundred sixty-one".