211158499860 has 864 divisors, whose sum is σ = 850153449600. Its totient is φ = 43502054400.

The previous prime is 211158499829. The next prime is 211158499873. The reversal of 211158499860 is 68994851112.

211158499860 is a `hidden beast` number, since 21 + 1 + 1 + 58 + 499 + 86 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 211158499797 and 211158499806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 390311190 + ... + 390311730.

It is an arithmetic number, because the mean of its divisors is an integer number (983973900).

Almost surely, 2^211158499860 is an apocalyptic number.

211158499860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211158499860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (425076724800).

211158499860 is an abundant number, since it is smaller than the sum of its proper divisors (638994949740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211158499860 is a wasteful number, since it uses less digits than its factorization.

211158499860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The spelling of 211158499860 in words is "two hundred eleven billion, one hundred fifty-eight million, four hundred ninety-nine thousand, eight hundred sixty".