26405144506031 has 8 divisors (see below), whose sum is σ = 26723375447664. Its totient is φ = 26086915866240.

The previous prime is 26405144506009. The next prime is 26405144506049. The reversal of 26405144506031 is 13060544150462.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26405144506031 is a prime.

It is a super-2 number, since 2×26405144506031² (a number of 28 digits) contains 22 as substring.

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 26405144506031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26405144506061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37961585 + ... + 38650901.

It is an arithmetic number, because the mean of its divisors is an integer number (3340421930958).

Almost surely, 2^{26405144506031} is an apocalyptic number.

26405144506031 is a deficient number, since it is larger than the sum of its proper divisors (318230941633).

26405144506031 is an equidigital number, since it uses as much as digits as its factorization.

26405144506031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150921.

The product of its (nonzero) digits is 345600, while the sum is 41.

Adding to 26405144506031 its reverse (13060544150462), we get a palindrome (39465688656493).

The spelling of 26405144506031 in words is "twenty-six trillion, four hundred five billion, one hundred forty-four million, five hundred six thousand, thirty-one".