26172121284 has 81 divisors (see below), whose sum is σ = 67445203917. Its totient is φ = 8557409088.

The previous prime is 26172121279. The next prime is 26172121303. The reversal of 26172121284 is 48212127162.

The square root of 26172121284 is 161778.

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

26172121284 is a `hidden beast` number, since 2 + 617 + 2 + 12 + 1 + 28 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22635202500 + 3536918784 = 150450^2 + 59472^2 .

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, 57269184 + ... + 57269640.

Almost surely, 2^26172121284 is an apocalyptic number.

26172121284 is the 161778-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26172121284

26172121284 is an abundant number, since it is smaller than the sum of its proper divisors (41273082633).

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

26172121284 is an equidigital number, since it uses as much as digits as its factorization.

26172121284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 521 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

Multiplying 26172121284 by its sum of digits (36), we get a square (942196366224 = 970668²).

26172121284 divided by its sum of digits (36) gives a square (727003369 = 26963²).

It can be divided in two parts, 26172 and 121284, that added together give a square (147456 = 384²).

The spelling of 26172121284 in words is "twenty-six billion, one hundred seventy-two million, one hundred twenty-one thousand, two hundred eighty-four".