61313231328 has 48 divisors (see below), whose sum is σ = 161004286800. Its totient is φ = 20430498816.

The previous prime is 61313231311. The next prime is 61313231351. The reversal of 61313231328 is 82313231316.

It is a tau number, because it is divible by the number of its divisors (48).

It is a nude number because it is divisible by every one of its digits.

It is a congruent 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, 162498 + ... + 386046.

It is an arithmetic number, because the mean of its divisors is an integer number (3354255975).

Almost surely, 2^61313231328 is an apocalyptic number.

It is an amenable number.

61313231328 is an abundant number, since it is smaller than the sum of its proper divisors (99691055472).

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

61313231328 is a wasteful number, since it uses less digits than its factorization.

61313231328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226419 (or 226411 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The spelling of 61313231328 in words is "sixty-one billion, three hundred thirteen million, two hundred thirty-one thousand, three hundred twenty-eight".