26861683129 has 4 divisors (see below), whose sum is σ = 26863242640. Its totient is φ = 26860123620.

The previous prime is 26861683127. The next prime is 26861683157. The reversal of 26861683129 is 92138616862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26861683129 - 2¹ = 26861683127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26861683127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753627 + ... + 788464.

It is an arithmetic number, because the mean of its divisors is an integer number (6715810660).

Almost surely, 2^26861683129 is an apocalyptic number.

It is an amenable number.

26861683129 is a deficient number, since it is larger than the sum of its proper divisors (1559511).

26861683129 is a wasteful number, since it uses less digits than its factorization.

26861683129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559510.

The product of its digits is 1492992, while the sum is 52.

The spelling of 26861683129 in words is "twenty-six billion, eight hundred sixty-one million, six hundred eighty-three thousand, one hundred twenty-nine".