2661325421536 has 48 divisors (see below), whose sum is σ = 5565760388496. Its totient is φ = 1248308914176.

The previous prime is 2661325421483. The next prime is 2661325421537. The reversal of 2661325421536 is 6351245231662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661325421537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7800651 + ... + 8134666.

It is an arithmetic number, because the mean of its divisors is an integer number (115953341427).

Almost surely, 2^{2661325421536} is an apocalyptic number.

It is an amenable number.

2661325421536 is an abundant number, since it is smaller than the sum of its proper divisors (2904434966960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2661325421536 is a wasteful number, since it uses less digits than its factorization.

2661325421536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15935651 (or 15935643 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 46.

The spelling of 2661325421536 in words is "two trillion, six hundred sixty-one billion, three hundred twenty-five million, four hundred twenty-one thousand, five hundred thirty-six".