211745915774 has 32 divisors (see below), whose sum is σ = 325799345664. Its totient is φ = 103173950880.

The previous prime is 211745915767. The next prime is 211745915833. The reversal of 211745915774 is 477519547112.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39926807 + ... + 39932109.

It is an arithmetic number, because the mean of its divisors is an integer number (10181229552).

Almost surely, 2^211745915774 is an apocalyptic number.

211745915774 is a deficient number, since it is larger than the sum of its proper divisors (114053429890).

211745915774 is a wasteful number, since it uses less digits than its factorization.

211745915774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7832.

The product of its digits is 2469600, while the sum is 53.

The spelling of 211745915774 in words is "two hundred eleven billion, seven hundred forty-five million, nine hundred fifteen thousand, seven hundred seventy-four".