26645264460 has 144 divisors (see below), whose sum is σ = 87822658560. Its totient is φ = 6514266240.

The previous prime is 26645264419. The next prime is 26645264461. The reversal of 26645264460 is 6446254662.

26645264460 is a `hidden beast` number, since 2 + 6 + 64 + 526 + 4 + 4 + 60 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (26645264461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19642 + ... + 231681.

Almost surely, 2^26645264460 is an apocalyptic number.

26645264460 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 26645264460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43911329280).

26645264460 is an abundant number, since it is smaller than the sum of its proper divisors (61177394100).

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

26645264460 is a wasteful number, since it uses less digits than its factorization.

26645264460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251388 (or 251383 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 45.

The spelling of 26645264460 in words is "twenty-six billion, six hundred forty-five million, two hundred sixty-four thousand, four hundred sixty".