220987583907691 has 2 divisors, whose sum is σ = 220987583907692. Its totient is φ = 220987583907690.

The previous prime is 220987583907661. The next prime is 220987583907721. The reversal of 220987583907691 is 196709385789022.

It is a balanced prime because it is at equal distance from previous prime (220987583907661) and next prime (220987583907721).

It is a cyclic number.

It is not a de Polignac number, because 220987583907691 - 2²³ = 220987575519083 is a prime.

It is not a weakly prime, because it can be changed into another prime (220987583907611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110493791953845 + 110493791953846.

It is an arithmetic number, because the mean of its divisors is an integer number (110493791953846).

Almost surely, 2^{220987583907691} is an apocalyptic number.

220987583907691 is a deficient number, since it is larger than the sum of its proper divisors (1).

220987583907691 is an equidigital number, since it uses as much as digits as its factorization.

220987583907691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 823011840, while the sum is 76.

The spelling of 220987583907691 in words is "two hundred twenty trillion, nine hundred eighty-seven billion, five hundred eighty-three million, nine hundred seven thousand, six hundred ninety-one".