209375557372 has 12 divisors (see below), whose sum is σ = 369292322560. Its totient is φ = 103863465216.

The previous prime is 209375557333. The next prime is 209375557427. The reversal of 209375557372 is 273755573902.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206077797 + ... + 206078812.

Almost surely, 2^209375557372 is an apocalyptic number.

It is an amenable number.

209375557372 is a deficient number, since it is larger than the sum of its proper divisors (159916765188).

209375557372 is a wasteful number, since it uses less digits than its factorization.

209375557372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412156740 (or 412156738 counting only the distinct ones).

The product of its (nonzero) digits is 13891500, while the sum is 55.

The spelling of 209375557372 in words is "two hundred nine billion, three hundred seventy-five million, five hundred fifty-seven thousand, three hundred seventy-two".