26618100421 has 12 divisors (see below), whose sum is σ = 30978968076. Its totient is φ = 22774843520.

The previous prime is 26618100373. The next prime is 26618100463. The reversal of 26618100421 is 12400181662.

It can be written as a sum of positive squares in 2 ways, for example, as 13855879521 + 12762220900 = 117711^2 + 112970^2 .

It is not a de Polignac number, because 26618100421 - 2²¹ = 26616003269 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 (26618130421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6468070 + ... + 6472183.

It is an arithmetic number, because the mean of its divisors is an integer number (2581580673).

Almost surely, 2^26618100421 is an apocalyptic number.

It is an amenable number.

26618100421 is a deficient number, since it is larger than the sum of its proper divisors (4360867655).

26618100421 is a wasteful number, since it uses less digits than its factorization.

26618100421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12940292 (or 12940281 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 26618100421 in words is "twenty-six billion, six hundred eighteen million, one hundred thousand, four hundred twenty-one".