219646138005 has 72 divisors (see below), whose sum is σ = 443381582592. Its totient is φ = 100295568576.

The previous prime is 219646137979. The next prime is 219646138027. The reversal of 219646138005 is 500831646912.

219646138005 is a `hidden beast` number, since 21 + 9 + 6 + 4 + 613 + 8 + 0 + 0 + 5 = 666.

It is not a de Polignac number, because 219646138005 - 2⁶ = 219646137941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1899684 + ... + 2011986.

It is an arithmetic number, because the mean of its divisors is an integer number (6158077536).

Almost surely, 2^219646138005 is an apocalyptic number.

It is an amenable number.

219646138005 is an abundant number, since it is smaller than the sum of its proper divisors (223735444587).

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

219646138005 is a wasteful number, since it uses less digits than its factorization.

219646138005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113215 (or 113205 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 219646138005 in words is "two hundred nineteen billion, six hundred forty-six million, one hundred thirty-eight thousand, five".