26215132621 has 8 divisors (see below), whose sum is σ = 27020594304. Its totient is φ = 25418571360.

The previous prime is 26215132597. The next prime is 26215132649. The reversal of 26215132621 is 12623151262.

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

It is a cyclic number.

It is not a de Polignac number, because 26215132621 - 2⁹ = 26215132109 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 (26215136621) 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, 2219125 + ... + 2230906.

It is an arithmetic number, because the mean of its divisors is an integer number (3377574288).

Almost surely, 2^26215132621 is an apocalyptic number.

It is an amenable number.

26215132621 is a deficient number, since it is larger than the sum of its proper divisors (805461683).

26215132621 is a wasteful number, since it uses less digits than its factorization.

26215132621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4450211.

The product of its digits is 8640, while the sum is 31.

Adding to 26215132621 its reverse (12623151262), we get a palindrome (38838283883).

The spelling of 26215132621 in words is "twenty-six billion, two hundred fifteen million, one hundred thirty-two thousand, six hundred twenty-one".