26115172420 has 12 divisors (see below), whose sum is σ = 54841862124. Its totient is φ = 10446068960.

The previous prime is 26115172403. The next prime is 26115172451. The reversal of 26115172420 is 2427151162.

It can be written as a sum of positive squares in 2 ways, for example, as 12206272324 + 13908900096 = 110482^2 + 117936^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652879291 + ... + 652879330.

It is an arithmetic number, because the mean of its divisors is an integer number (4570155177).

Almost surely, 2^26115172420 is an apocalyptic number.

26115172420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26115172420 is an abundant number, since it is smaller than the sum of its proper divisors (28726689704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26115172420 is a wasteful number, since it uses less digits than its factorization.

26115172420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305758630 (or 1305758628 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The spelling of 26115172420 in words is "twenty-six billion, one hundred fifteen million, one hundred seventy-two thousand, four hundred twenty".