99876543210 has 64 divisors (see below), whose sum is σ = 266627923200. Its totient is φ = 26604697536.

The previous prime is 99876543203. The next prime is 99876543259. The reversal of 99876543210 is 1234567899.

99876543210 is a `hidden beast` number, since 9 + 9 + 8 + 76 + 543 + 21 + 0 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46872 + ... + 449388.

It is an arithmetic number, because the mean of its divisors is an integer number (4166061300).

It is a 2-persistent number, because it is pandigital, and so is 2⋅99876543210 = 199753086420, but 3⋅99876543210 = 299629629630 is not.

Almost surely, 2^99876543210 is an apocalyptic number.

99876543210 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

99876543210 is an abundant number, since it is smaller than the sum of its proper divisors (166751379990).

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

99876543210 is a wasteful number, since it uses less digits than its factorization.

99876543210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403452 (or 403446 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 99876543210 in words is "ninety-nine billion, eight hundred seventy-six million, five hundred forty-three thousand, two hundred ten".