211787874345 has 16 divisors (see below), whose sum is σ = 338867165952. Its totient is φ = 112951344000.

The previous prime is 211787874299. The next prime is 211787874349. The reversal of 211787874345 is 543478787112.

It is not a de Polignac number, because 211787874345 - 2¹³ = 211787866153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211787874349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 932704 + ... + 1137326.

It is an arithmetic number, because the mean of its divisors is an integer number (21179197872).

Almost surely, 2^211787874345 is an apocalyptic number.

It is an amenable number.

211787874345 is a deficient number, since it is larger than the sum of its proper divisors (127079291607).

211787874345 is a wasteful number, since it uses less digits than its factorization.

211787874345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273632.

The product of its digits is 10536960, while the sum is 57.

The spelling of 211787874345 in words is "two hundred eleven billion, seven hundred eighty-seven million, eight hundred seventy-four thousand, three hundred forty-five".