22061215561725 has 36 divisors (see below), whose sum is σ = 39534116526996. Its totient is φ = 11760017898240.

The previous prime is 22061215561717. The next prime is 22061215561741. The reversal of 22061215561725 is 52716551216022.

22061215561725 is a `hidden beast` number, since 2 + 2 + 0 + 6 + 1 + 2 + 1 + 5 + 5 + 617 + 25 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 637158564 + 22060578403161 = 25242^2 + 4696869^2 .

It is not a de Polignac number, because 22061215561725 - 2³ = 22061215561717 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24403984 + ... + 25291833.

Almost surely, 2^{22061215561725} is an apocalyptic number.

22061215561725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22061215561725 is a deficient number, since it is larger than the sum of its proper divisors (17472900965271).

22061215561725 is a wasteful number, since it uses less digits than its factorization.

22061215561725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49697806 (or 49697798 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

Adding to 22061215561725 its reverse (52716551216022), we get a palindrome (74777766777747).

The spelling of 22061215561725 in words is "twenty-two trillion, sixty-one billion, two hundred fifteen million, five hundred sixty-one thousand, seven hundred twenty-five".