26403650064 has 135 divisors (see below), whose sum is σ = 81287868207. Its totient is φ = 7994606400.

The previous prime is 26403650059. The next prime is 26403650089. The reversal of 26403650064 is 46005630462.

The square root of 26403650064 is 162492.

It is a perfect power (a square), and thus also a powerful number.

26403650064 is a `hidden beast` number, since 2 + 64 + 0 + 36 + 500 + 64 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 21448329 + ... + 21449559.

Almost surely, 2^26403650064 is an apocalyptic number.

26403650064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

26403650064 is the 162492-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26403650064

26403650064 is an abundant number, since it is smaller than the sum of its proper divisors (54884218143).

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

26403650064 is a wasteful number, since it uses less digits than its factorization.

26403650064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Multiplying 26403650064 by its sum of digits (36), we get a square (950531402304 = 974952²).

26403650064 divided by its sum of digits (36) gives a square (733434724 = 27082²).

The spelling of 26403650064 in words is "twenty-six billion, four hundred three million, six hundred fifty thousand, sixty-four".