26728642031 has 16 divisors (see below), whose sum is σ = 32917416000. Its totient is φ = 21134677248.

The previous prime is 26728642009. The next prime is 26728642043. The reversal of 26728642031 is 13024682762.

It is a cyclic number.

It is not a de Polignac number, because 26728642031 - 2³⁴ = 9548772847 is a prime.

It is a super-2 number, since 2×26728642031² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26728642031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26728642231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55145 + ... + 237693.

It is an arithmetic number, because the mean of its divisors is an integer number (2057338500).

Almost surely, 2^26728642031 is an apocalyptic number.

26728642031 is a deficient number, since it is larger than the sum of its proper divisors (6188773969).

26728642031 is a wasteful number, since it uses less digits than its factorization.

26728642031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184178.

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 26728642031 in words is "twenty-six billion, seven hundred twenty-eight million, six hundred forty-two thousand, thirty-one".