206120615520 has 48 divisors (see below), whose sum is σ = 649279940400. Its totient is φ = 54965497344.

The previous prime is 206120615509. The next prime is 206120615521. The reversal of 206120615520 is 25516021602.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206120615521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214708495 + ... + 214709454.

It is an arithmetic number, because the mean of its divisors is an integer number (13526665425).

Almost surely, 2^206120615520 is an apocalyptic number.

206120615520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206120615520 is an abundant number, since it is smaller than the sum of its proper divisors (443159324880).

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

206120615520 is a wasteful number, since it uses less digits than its factorization.

206120615520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429417967 (or 429417959 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 206120615520 in words is "two hundred six billion, one hundred twenty million, six hundred fifteen thousand, five hundred twenty".