21554610630359 has 2 divisors, whose sum is σ = 21554610630360. Its totient is φ = 21554610630358.

The previous prime is 21554610630281. The next prime is 21554610630361. The reversal of 21554610630359 is 95303601645512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21554610630359 is a prime.

Together with 21554610630361, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21554610630559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10777305315179 + 10777305315180.

It is an arithmetic number, because the mean of its divisors is an integer number (10777305315180).

Almost surely, 2^{21554610630359} is an apocalyptic number.

21554610630359 is a deficient number, since it is larger than the sum of its proper divisors (1).

21554610630359 is an equidigital number, since it uses as much as digits as its factorization.

21554610630359 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916000, while the sum is 50.

The spelling of 21554610630359 in words is "twenty-one trillion, five hundred fifty-four billion, six hundred ten million, six hundred thirty thousand, three hundred fifty-nine".