209653148738 has 32 divisors (see below), whose sum is σ = 366347128320. Its totient is φ = 89042688000.

The previous prime is 209653148713. The next prime is 209653148777. The reversal of 209653148738 is 837841356902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5280383 + ... + 5319938.

It is an arithmetic number, because the mean of its divisors is an integer number (11448347760).

It is a 1-persistent number, because it is pandigital, but 2⋅209653148738 = 419306297476 is not.

Almost surely, 2^209653148738 is an apocalyptic number.

209653148738 is a deficient number, since it is larger than the sum of its proper divisors (156693979582).

209653148738 is a wasteful number, since it uses less digits than its factorization.

209653148738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10600394.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 209653148738 in words is "two hundred nine billion, six hundred fifty-three million, one hundred forty-eight thousand, seven hundred thirty-eight".