209615405130 has 48 divisors (see below), whose sum is σ = 545121765864. Its totient is φ = 55884958080.

The previous prime is 209615405123. The next prime is 209615405171. The reversal of 209615405130 is 31504516902.

209615405130 is a `hidden beast` number, since 2 + 0 + 9 + 61 + 540 + 51 + 3 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 52207223121 + 157408182009 = 228489^2 + 396747^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148720 + ... + 664340.

Almost surely, 2^209615405130 is an apocalyptic number.

209615405130 is an abundant number, since it is smaller than the sum of its proper divisors (335506360734).

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

209615405130 is a wasteful number, since it uses less digits than its factorization.

209615405130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520151 (or 520148 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 209615405130 in words is "two hundred nine billion, six hundred fifteen million, four hundred five thousand, one hundred thirty".