651540642413216 has 48 divisors (see below), whose sum is σ = 1326987655812000. Its totient is φ = 314528501591808.

The previous prime is 651540642413197. The next prime is 651540642413273. The reversal of 651540642413216 is 612314246045156.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25672871 + ... + 44296473.

It is an arithmetic number, because the mean of its divisors is an integer number (27645576162750).

Almost surely, 2^{651540642413216} is an apocalyptic number.

It is an amenable number.

651540642413216 is an abundant number, since it is smaller than the sum of its proper divisors (675447013398784).

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

651540642413216 is a wasteful number, since it uses less digits than its factorization.

651540642413216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18661341 (or 18661333 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 50.

The spelling of 651540642413216 in words is "six hundred fifty-one trillion, five hundred forty billion, six hundred forty-two million, four hundred thirteen thousand, two hundred sixteen".