26437479944121 has 9 divisors (see below), whose sum is σ = 38187493311279. Its totient is φ = 17624976345936.

The previous prime is 26437479944107. The next prime is 26437479944143. The reversal of 26437479944121 is 12144997473462.

It is a happy number.

The square root of 26437479944121 is 5141739.

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

26437479944121 is a `hidden beast` number, since 2 + 6 + 4 + 37 + 479 + 9 + 4 + 4 + 121 = 666.

It can be written as a sum of positive squares in only one way, i.e., 277692111225 + 26159787832896 = 526965^2 + 5114664^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-26437479944121 is a prime.

It is a super-2 number, since 2×26437479944121² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26437479964121) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14568261 + ... + 16282173.

Almost surely, 2^{26437479944121} is an apocalyptic number.

26437479944121 is the 5141739-th square number.

26437479944121 is the 2570870-th centered octagonal number.

It is an amenable number.

26437479944121 is a deficient number, since it is larger than the sum of its proper divisors (11750013367158).

26437479944121 is an frugal number, since it uses more digits than its factorization.

26437479944121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3427832 (or 1713916 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 63.

The spelling of 26437479944121 in words is "twenty-six trillion, four hundred thirty-seven billion, four hundred seventy-nine million, nine hundred forty-four thousand, one hundred twenty-one".