26530645121 has 4 divisors (see below), whose sum is σ = 27147636912. Its totient is φ = 25913653332.

The previous prime is 26530645103. The next prime is 26530645139. The reversal of 26530645121 is 12154603562.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12154603562 = 2 ⋅6077301781.

It is an interprime number because it is at equal distance from previous prime (26530645103) and next prime (26530645139).

It is a cyclic number.

It is not a de Polignac number, because 26530645121 - 2²² = 26526450817 is a prime.

It is a super-2 number, since 2×26530645121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26530645171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308495831 + ... + 308495916.

It is an arithmetic number, because the mean of its divisors is an integer number (6786909228).

Almost surely, 2^26530645121 is an apocalyptic number.

It is an amenable number.

26530645121 is a deficient number, since it is larger than the sum of its proper divisors (616991791).

26530645121 is an equidigital number, since it uses as much as digits as its factorization.

26530645121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616991790.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 26530645121 in words is "twenty-six billion, five hundred thirty million, six hundred forty-five thousand, one hundred twenty-one".