219631377540961 has 4 divisors (see below), whose sum is σ = 219640739914800. Its totient is φ = 219622015167124.

The previous prime is 219631377540943. The next prime is 219631377541001. The reversal of 219631377540961 is 169045773136912.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 219631377540961 - 2¹¹ = 219631377538913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 219631377540893 and 219631377540902.

It is not an unprimeable number, because it can be changed into a prime (219631377540901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4681151731 + ... + 4681198648.

It is an arithmetic number, because the mean of its divisors is an integer number (54910184978700).

Almost surely, 2^{219631377540961} is an apocalyptic number.

It is an amenable number.

219631377540961 is a deficient number, since it is larger than the sum of its proper divisors (9362373839).

219631377540961 is an equidigital number, since it uses as much as digits as its factorization.

219631377540961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9362373838.

The product of its (nonzero) digits is 51438240, while the sum is 64.

The spelling of 219631377540961 in words is "two hundred nineteen trillion, six hundred thirty-one billion, three hundred seventy-seven million, five hundred forty thousand, nine hundred sixty-one".