26687297670 has 256 divisors, whose sum is σ = 76074909696. Its totient is φ = 5924160000.

The previous prime is 26687297627. The next prime is 26687297671. The reversal of 26687297670 is 7679278662.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26687297671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 23763729 + ... + 23764851.

It is an arithmetic number, because the mean of its divisors is an integer number (297167616).

Almost surely, 2^26687297670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26687297670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38037454848).

26687297670 is an abundant number, since it is smaller than the sum of its proper divisors (49387612026).

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

26687297670 is a wasteful number, since it uses less digits than its factorization.

26687297670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299.

The product of its (nonzero) digits is 21337344, while the sum is 60.

The spelling of 26687297670 in words is "twenty-six billion, six hundred eighty-seven million, two hundred ninety-seven thousand, six hundred seventy".