206251043540 has 48 divisors (see below), whose sum is σ = 437544180864. Its totient is φ = 81659568000.

The previous prime is 206251043507. The next prime is 206251043543. The reversal of 206251043540 is 45340152602.

It is a super-2 number, since 2×206251043540² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206251043497 and 206251043506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206251043543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7887167 + ... + 7913273.

It is an arithmetic number, because the mean of its divisors is an integer number (9115503768).

Almost surely, 2^206251043540 is an apocalyptic number.

206251043540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206251043540 is an abundant number, since it is smaller than the sum of its proper divisors (231293137324).

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

206251043540 is a wasteful number, since it uses less digits than its factorization.

206251043540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30128 (or 30126 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 206251043540 in words is "two hundred six billion, two hundred fifty-one million, forty-three thousand, five hundred forty".