26125065561 has 32 divisors (see below), whose sum is σ = 41882819328. Its totient is φ = 14170844160.

The previous prime is 26125065559. The next prime is 26125065563. The reversal of 26125065561 is 16556052162.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (26125065559) and next prime (26125065563).

It is not a de Polignac number, because 26125065561 - 2¹ = 26125065559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26125065563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378180 + ... + 441893.

It is an arithmetic number, because the mean of its divisors is an integer number (1308838104).

Almost surely, 2^26125065561 is an apocalyptic number.

26125065561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26125065561 is a deficient number, since it is larger than the sum of its proper divisors (15757753767).

26125065561 is a wasteful number, since it uses less digits than its factorization.

26125065561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820161.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 26125065561 in words is "twenty-six billion, one hundred twenty-five million, sixty-five thousand, five hundred sixty-one".