26451564 has 48 divisors (see below), whose sum is σ = 64834560. Its totient is φ = 8377600.

The previous prime is 26451539. The next prime is 26451589. The reversal of 26451564 is 46515462.

It is an interprime number because it is at equal distance from previous prime (26451539) and next prime (26451589).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65764 + ... + 66164.

It is an arithmetic number, because the mean of its divisors is an integer number (1350720).

Almost surely, 2^26451564 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 26451564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32417280).

26451564 is an abundant number, since it is smaller than the sum of its proper divisors (38382996).

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

26451564 is a wasteful number, since it uses less digits than its factorization.

26451564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 668 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 26451564 is about 5143.1083986243. The cubic root of 26451564 is about 297.9548450417.

The spelling of 26451564 in words is "twenty-six million, four hundred fifty-one thousand, five hundred sixty-four".