210862681380 has 672 divisors, whose sum is σ = 781832798208. Its totient is φ = 47253196800.

The previous prime is 210862681361. The next prime is 210862681439. The reversal of 210862681380 is 83186268012.

210862681380 is a `hidden beast` number, since 2 + 1 + 0 + 8 + 6 + 268 + 1 + 380 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 99886525 + ... + 99888635.

It is an arithmetic number, because the mean of its divisors is an integer number (1163441664).

Almost surely, 2^210862681380 is an apocalyptic number.

210862681380 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 210862681380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (390916399104).

210862681380 is an abundant number, since it is smaller than the sum of its proper divisors (570970116828).

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

210862681380 is a wasteful number, since it uses less digits than its factorization.

210862681380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199 (or 2182 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 210862681380 in words is "two hundred ten billion, eight hundred sixty-two million, six hundred eighty-one thousand, three hundred eighty".