312061521640 has 64 divisors (see below), whose sum is σ = 772299645120. Its totient is φ = 113476897600.

The previous prime is 312061521631. The next prime is 312061521691. The reversal of 312061521640 is 46125160213.

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 15 ways as a sum of consecutive naturals, for example, 2877466 + ... + 2983945.

It is an arithmetic number, because the mean of its divisors is an integer number (12067181955).

Almost surely, 2^312061521640 is an apocalyptic number.

It is an amenable number.

312061521640 is an abundant number, since it is smaller than the sum of its proper divisors (460238123480).

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

312061521640 is a wasteful number, since it uses less digits than its factorization.

312061521640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5861455 (or 5861429 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 312061521640 its reverse (46125160213), we get a palindrome (358186681853).

The spelling of 312061521640 in words is "three hundred twelve billion, sixty-one million, five hundred twenty-one thousand, six hundred forty".