206890078500 has 1728 divisors, whose sum is σ = 870021734400. Its totient is φ = 42620256000.

The previous prime is 206890078471. The next prime is 206890078537. The reversal of 206890078500 is 5870098602.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 575 ways as a sum of consecutive naturals, for example, 3506611471 + ... + 3506611529.

It is an arithmetic number, because the mean of its divisors is an integer number (503484800).

Almost surely, 2^206890078500 is an apocalyptic number.

206890078500 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 206890078500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (435010867200).

206890078500 is an abundant number, since it is smaller than the sum of its proper divisors (663131655900).

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

206890078500 is a wasteful number, since it uses less digits than its factorization.

206890078500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 206890078500 in words is "two hundred six billion, eight hundred ninety million, seventy-eight thousand, five hundred".