26604145620 has 216 divisors, whose sum is σ = 87659260416. Its totient is φ = 6528128256.

The previous prime is 26604145567. The next prime is 26604145627. The reversal of 26604145620 is 2654140662.

26604145620 is a `hidden beast` number, since 2 + 6 + 604 + 1 + 45 + 6 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26604145627) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11162949 + ... + 11165331.

Almost surely, 2^26604145620 is an apocalyptic number.

26604145620 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 26604145620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43829630208).

26604145620 is an abundant number, since it is smaller than the sum of its proper divisors (61055114796).

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

26604145620 is a wasteful number, since it uses less digits than its factorization.

26604145620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791 (or 2773 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 26604145620 in words is "twenty-six billion, six hundred four million, one hundred forty-five thousand, six hundred twenty".