26661438783 has 24 divisors (see below), whose sum is σ = 44017428000. Its totient is φ = 15233413824.

The previous prime is 26661438781. The next prime is 26661438821. The reversal of 26661438783 is 38783416662.

It is not a de Polignac number, because 26661438783 - 2¹ = 26661438781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26661438781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 745393 + ... + 780341.

It is an arithmetic number, because the mean of its divisors is an integer number (1834059500).

Almost surely, 2^26661438783 is an apocalyptic number.

26661438783 is a deficient number, since it is larger than the sum of its proper divisors (17355989217).

26661438783 is a wasteful number, since it uses less digits than its factorization.

26661438783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47071 (or 47068 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The spelling of 26661438783 in words is "twenty-six billion, six hundred sixty-one million, four hundred thirty-eight thousand, seven hundred eighty-three".