26979321987 has 12 divisors (see below), whose sum is σ = 39608987184. Its totient is φ = 17691358320.

The previous prime is 26979321953. The next prime is 26979322033. The reversal of 26979321987 is 78912397962.

It is not a de Polignac number, because 26979321987 - 2⁶ = 26979321923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26979331987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24570783 + ... + 24571880.

It is an arithmetic number, because the mean of its divisors is an integer number (3300748932).

Almost surely, 2^26979321987 is an apocalyptic number.

26979321987 is a deficient number, since it is larger than the sum of its proper divisors (12629665197).

26979321987 is a wasteful number, since it uses less digits than its factorization.

26979321987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49142730 (or 49142727 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

The spelling of 26979321987 in words is "twenty-six billion, nine hundred seventy-nine million, three hundred twenty-one thousand, nine hundred eighty-seven".