26720705125 has 32 divisors (see below), whose sum is σ = 34597836000. Its totient is φ = 20579328000.

The previous prime is 26720705107. The next prime is 26720705149. The reversal of 26720705125 is 52150702762.

It can be written as a sum of positive squares in 16 ways, for example, as 12236341924 + 14484363201 = 110618^2 + 120351^2 .

It is not a de Polignac number, because 26720705125 - 2²⁹ = 26183834213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1254565 + ... + 1275685.

It is an arithmetic number, because the mean of its divisors is an integer number (1081182375).

Almost surely, 2^26720705125 is an apocalyptic number.

26720705125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26720705125 is a deficient number, since it is larger than the sum of its proper divisors (7877130875).

26720705125 is a wasteful number, since it uses less digits than its factorization.

26720705125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21514 (or 21504 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 37.

The spelling of 26720705125 in words is "twenty-six billion, seven hundred twenty million, seven hundred five thousand, one hundred twenty-five".