26137240221 has 16 divisors (see below), whose sum is σ = 35586834944. Its totient is φ = 17059428144.

The previous prime is 26137240193. The next prime is 26137240303. The reversal of 26137240221 is 12204273162.

It is not a de Polignac number, because 26137240221 - 2¹⁷ = 26137109149 is a prime.

It is a super-3 number, since 3×26137240221³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26137240421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 366121 + ... + 431646.

It is an arithmetic number, because the mean of its divisors is an integer number (2224177184).

Almost surely, 2^26137240221 is an apocalyptic number.

It is an amenable number.

26137240221 is a deficient number, since it is larger than the sum of its proper divisors (9449594723).

26137240221 is a wasteful number, since it uses less digits than its factorization.

26137240221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798000.

The product of its (nonzero) digits is 8064, while the sum is 30.

The spelling of 26137240221 in words is "twenty-six billion, one hundred thirty-seven million, two hundred forty thousand, two hundred twenty-one".