209026621396 has 6 divisors (see below), whose sum is σ = 365796587450. Its totient is φ = 104513310696.

The previous prime is 209026621393. The next prime is 209026621423. The reversal of 209026621396 is 693126620902.

It can be written as a sum of positive squares in only one way, i.e., 207553136400 + 1473484996 = 455580^2 + 38386^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209026621393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26128327671 + ... + 26128327678.

Almost surely, 2^209026621396 is an apocalyptic number.

It is an amenable number.

209026621396 is a deficient number, since it is larger than the sum of its proper divisors (156769966054).

209026621396 is a wasteful number, since it uses less digits than its factorization.

209026621396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52256655353 (or 52256655351 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 46.

The spelling of 209026621396 in words is "two hundred nine billion, twenty-six million, six hundred twenty-one thousand, three hundred ninety-six".