26928201399121 has 9 divisors (see below), whose sum is σ = 29598829569883. Its totient is φ = 24480131197720.

The previous prime is 26928201399091. The next prime is 26928201399193. The reversal of 26928201399121 is 12199310282962.

The square root of 26928201399121 is 5189239.

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

It can be written as a sum of positive squares in only one way, i.e., 1809861686721 + 25118339712400 = 1345311^2 + 5011820^2 .

It is a de Polignac number, because none of the positive numbers 2^k-26928201399121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26928201399721) 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, 56845755 + ... + 57317503.

Almost surely, 2^{26928201399121} is an apocalyptic number.

26928201399121 is the 5189239-th square number.

26928201399121 is the 2594620-th centered octagonal number.

It is an amenable number.

26928201399121 is a deficient number, since it is larger than the sum of its proper divisors (2670628170762).

26928201399121 is an frugal number, since it uses more digits than its factorization.

26928201399121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943520 (or 471760 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 55.

The spelling of 26928201399121 in words is "twenty-six trillion, nine hundred twenty-eight billion, two hundred one million, three hundred ninety-nine thousand, one hundred twenty-one".