26906685520 has 160 divisors (see below), whose sum is σ = 73874021760. Its totient is φ = 8985016320.

The previous prime is 26906685511. The next prime is 26906685523. The reversal of 26906685520 is 2558660962.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26906685523) 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, 2247711 + ... + 2259649.

It is an arithmetic number, because the mean of its divisors is an integer number (461712636).

Almost surely, 2^26906685520 is an apocalyptic number.

26906685520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26906685520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36937010880).

26906685520 is an abundant number, since it is smaller than the sum of its proper divisors (46967336240).

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

26906685520 is a wasteful number, since it uses less digits than its factorization.

26906685520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12173 (or 12167 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 26906685520 in words is "twenty-six billion, nine hundred six million, six hundred eighty-five thousand, five hundred twenty".