201861915540547 has 2 divisors, whose sum is σ = 201861915540548. Its totient is φ = 201861915540546.

The previous prime is 201861915540473. The next prime is 201861915540563. The reversal of 201861915540547 is 745045519168102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201861915540547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201861915540491 and 201861915540500.

It is not a weakly prime, because it can be changed into another prime (201861915540647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100930957770273 + 100930957770274.

It is an arithmetic number, because the mean of its divisors is an integer number (100930957770274).

Almost surely, 2^{201861915540547} is an apocalyptic number.

201861915540547 is a deficient number, since it is larger than the sum of its proper divisors (1).

201861915540547 is an equidigital number, since it uses as much as digits as its factorization.

201861915540547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096000, while the sum is 58.

The spelling of 201861915540547 in words is "two hundred one trillion, eight hundred sixty-one billion, nine hundred fifteen million, five hundred forty thousand, five hundred forty-seven".