26607861616 has 120 divisors (see below), whose sum is σ = 60770324736. Its totient is φ = 11252183040.

The previous prime is 26607861589. The next prime is 26607861617. The reversal of 26607861616 is 61616870662.

It is a super-2 number, since 2×26607861616² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 26607861616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26607861617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20514280 + ... + 20515576.

Almost surely, 2^26607861616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26607861616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30385162368).

26607861616 is an abundant number, since it is smaller than the sum of its proper divisors (34162463120).

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

26607861616 is a wasteful number, since it uses less digits than its factorization.

26607861616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 26607861616 in words is "twenty-six billion, six hundred seven million, eight hundred sixty-one thousand, six hundred sixteen".