26401263402 has 8 divisors (see below), whose sum is σ = 52802526816. Its totient is φ = 8800421132.

The previous prime is 26401263389. The next prime is 26401263403. The reversal of 26401263402 is 20436210462.

It is a sphenic number, since it is the product of 3 distinct primes.

26401263402 is an admirable number.

It is a super-2 number, since 2×26401263402² (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 26401263402.

It is not an unprimeable number, because it can be changed into a prime (26401263403) 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 3 ways as a sum of consecutive naturals, for example, 2200105278 + ... + 2200105289.

It is an arithmetic number, because the mean of its divisors is an integer number (6600315852).

Almost surely, 2^26401263402 is an apocalyptic number.

26401263402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26401263402 is a wasteful number, since it uses less digits than its factorization.

26401263402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4400210572.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 26401263402 its reverse (20436210462), we get a palindrome (46837473864).

The spelling of 26401263402 in words is "twenty-six billion, four hundred one million, two hundred sixty-three thousand, four hundred two".