4911712501261 has 2 divisors, whose sum is σ = 4911712501262. Its totient is φ = 4911712501260.

The previous prime is 4911712501259. The next prime is 4911712501291. The reversal of 4911712501261 is 1621052171194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3833251021161 + 1078461480100 = 1957869^2 + 1038490^2 .

It is a cyclic number.

It is not a de Polignac number, because 4911712501261 - 2¹ = 4911712501259 is a prime.

Together with 4911712501259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4911712501231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2455856250630 + 2455856250631.

It is an arithmetic number, because the mean of its divisors is an integer number (2455856250631).

Almost surely, 2^{4911712501261} is an apocalyptic number.

It is an amenable number.

4911712501261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4911712501261 is an equidigital number, since it uses as much as digits as its factorization.

4911712501261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 40.

The spelling of 4911712501261 in words is "four trillion, nine hundred eleven billion, seven hundred twelve million, five hundred one thousand, two hundred sixty-one".