26400644220200 has 48 divisors (see below), whose sum is σ = 61442332273500. Its totient is φ = 10549791544320.

The previous prime is 26400644220193. The next prime is 26400644220221. The reversal of 26400644220200 is 202244600462.

It can be written as a sum of positive squares in 6 ways, for example, as 16571754588964 + 9828889631236 = 4070842^2 + 3135106^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65211095 + ... + 65614694.

Almost surely, 2^{26400644220200} is an apocalyptic number.

26400644220200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26400644220200 is an abundant number, since it is smaller than the sum of its proper divisors (35041688053300).

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

26400644220200 is a wasteful number, since it uses less digits than its factorization.

26400644220200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130826814 (or 130826805 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 26400644220200 its reverse (202244600462), we get a palindrome (26602888820662).

The spelling of 26400644220200 in words is "twenty-six trillion, four hundred billion, six hundred forty-four million, two hundred twenty thousand, two hundred".