326478649540 has 24 divisors (see below), whose sum is σ = 707721460992. Its totient is φ = 126378831840.

The previous prime is 326478649487. The next prime is 326478649559. The reversal of 326478649540 is 45946874623.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263288614 + ... + 263289853.

It is an arithmetic number, because the mean of its divisors is an integer number (29488394208).

Almost surely, 2^326478649540 is an apocalyptic number.

It is an amenable number.

326478649540 is an abundant number, since it is smaller than the sum of its proper divisors (381242811452).

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

326478649540 is a wasteful number, since it uses less digits than its factorization.

326478649540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526578507 (or 526578505 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 58.

The spelling of 326478649540 in words is "three hundred twenty-six billion, four hundred seventy-eight million, six hundred forty-nine thousand, five hundred forty".