26155815401 has 8 divisors (see below), whose sum is σ = 27060625800. Its totient is φ = 25251197440.

The previous prime is 26155815347. The next prime is 26155815407. The reversal of 26155815401 is 10451855162.

It can be written as a sum of positive squares in 4 ways, for example, as 2247234025 + 23908581376 = 47405^2 + 154624^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26155815401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26155815407) 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, 262511 + ... + 348171.

It is an arithmetic number, because the mean of its divisors is an integer number (3382578225).

Almost surely, 2^26155815401 is an apocalyptic number.

It is an amenable number.

26155815401 is a deficient number, since it is larger than the sum of its proper divisors (904810399).

26155815401 is a wasteful number, since it uses less digits than its factorization.

26155815401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96219.

The product of its (nonzero) digits is 48000, while the sum is 38.

The spelling of 26155815401 in words is "twenty-six billion, one hundred fifty-five million, eight hundred fifteen thousand, four hundred one".