206532421651 has 8 divisors (see below), whose sum is σ = 207180398880. Its totient is φ = 205885445568.

The previous prime is 206532421603. The next prime is 206532421663. The reversal of 206532421651 is 156124235602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206532421651 - 2¹⁵ = 206532388883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206532421651.

It is not an unprimeable number, because it can be changed into a prime (206532421681) 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, 164025 + ... + 663301.

It is an arithmetic number, because the mean of its divisors is an integer number (25897549860).

Almost surely, 2^206532421651 is an apocalyptic number.

206532421651 is a deficient number, since it is larger than the sum of its proper divisors (647977229).

206532421651 is an equidigital number, since it uses as much as digits as its factorization.

206532421651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500573.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 206532421651 in words is "two hundred six billion, five hundred thirty-two million, four hundred twenty-one thousand, six hundred fifty-one".