651040205406 has 8 divisors (see below), whose sum is σ = 1302080410824. Its totient is φ = 217013401800.

The previous prime is 651040205393. The next prime is 651040205423. The reversal of 651040205406 is 604502040156.

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

651040205406 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54253350445 + ... + 54253350456.

It is an arithmetic number, because the mean of its divisors is an integer number (162760051353).

Almost surely, 2^651040205406 is an apocalyptic number.

651040205406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

651040205406 is a wasteful number, since it uses less digits than its factorization.

651040205406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108506700906.

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 651040205406 in words is "six hundred fifty-one billion, forty million, two hundred five thousand, four hundred six".