26778962851 has 16 divisors (see below), whose sum is σ = 27566812000. Its totient is φ = 26004499200.

The previous prime is 26778962839. The next prime is 26778962863. The reversal of 26778962851 is 15826987762.

It is an interprime number because it is at equal distance from previous prime (26778962839) and next prime (26778962863).

It is a cyclic number.

It is not a de Polignac number, because 26778962851 - 2¹⁵ = 26778930083 is a prime.

It is a super-2 number, since 2×26778962851² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26778962851.

It is not an unprimeable number, because it can be changed into a prime (26778962801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1525975 + ... + 1543423.

It is an arithmetic number, because the mean of its divisors is an integer number (1722925750).

Almost surely, 2^26778962851 is an apocalyptic number.

26778962851 is a deficient number, since it is larger than the sum of its proper divisors (787849149).

26778962851 is a wasteful number, since it uses less digits than its factorization.

26778962851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17830.

The product of its digits is 20321280, while the sum is 61.

The spelling of 26778962851 in words is "twenty-six billion, seven hundred seventy-eight million, nine hundred sixty-two thousand, eight hundred fifty-one".