26220520461 has 4 divisors (see below), whose sum is σ = 34960693952. Its totient is φ = 17480346972.

The previous prime is 26220520439. The next prime is 26220520463. The reversal of 26220520461 is 16402502262.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 26220520461 - 2¹¹ = 26220518413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26220520463) 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, 4370086741 + ... + 4370086746.

It is an arithmetic number, because the mean of its divisors is an integer number (8740173488).

Almost surely, 2^26220520461 is an apocalyptic number.

It is an amenable number.

26220520461 is a deficient number, since it is larger than the sum of its proper divisors (8740173491).

26220520461 is an equidigital number, since it uses as much as digits as its factorization.

26220520461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8740173490.

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 26220520461 in words is "twenty-six billion, two hundred twenty million, five hundred twenty thousand, four hundred sixty-one".