211420166461 has 16 divisors (see below), whose sum is σ = 249439227904. Its totient is φ = 175405906944.

The previous prime is 211420166449. The next prime is 211420166479. The reversal of 211420166461 is 164661024112.

It is a cyclic number.

It is not a de Polignac number, because 211420166461 - 2⁷ = 211420166333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211420166861) 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 in 15 ways as a sum of consecutive naturals, for example, 2064765 + ... + 2164738.

It is an arithmetic number, because the mean of its divisors is an integer number (15589951744).

Almost surely, 2^211420166461 is an apocalyptic number.

It is an amenable number.

211420166461 is a deficient number, since it is larger than the sum of its proper divisors (38019061443).

211420166461 is a wasteful number, since it uses less digits than its factorization.

211420166461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4229740.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 211420166461 in words is "two hundred eleven billion, four hundred twenty million, one hundred sixty-six thousand, four hundred sixty-one".