209672686132612 has 6 divisors (see below), whose sum is σ = 366927200732078. Its totient is φ = 104836343066304.

The previous prime is 209672686132597. The next prime is 209672686132633. The reversal of 209672686132612 is 216231686276902.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 209126999578176 + 545686554436 = 14461224^2 + 738706^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26209085766573 + ... + 26209085766580.

Almost surely, 2^{209672686132612} is an apocalyptic number.

It is an amenable number.

209672686132612 is a deficient number, since it is larger than the sum of its proper divisors (157254514599466).

209672686132612 is a wasteful number, since it uses less digits than its factorization.

209672686132612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52418171533157 (or 52418171533155 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 61.

The spelling of 209672686132612 in words is "two hundred nine trillion, six hundred seventy-two billion, six hundred eighty-six million, one hundred thirty-two thousand, six hundred twelve".