31477431643944 has 192 divisors, whose sum is σ = 93691150295040. Its totient is φ = 8735544679680.

The previous prime is 31477431643919. The next prime is 31477431643961. The reversal of 31477431643944 is 44934613477413.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2888599 + ... + 8443865.

It is an arithmetic number, because the mean of its divisors is an integer number (487974741120).

Almost surely, 2^{31477431643944} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31477431643944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46845575147520).

31477431643944 is an abundant number, since it is smaller than the sum of its proper divisors (62213718651096).

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

31477431643944 is a wasteful number, since it uses less digits than its factorization.

31477431643944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555440 (or 5555423 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 60.

The spelling of 31477431643944 in words is "thirty-one trillion, four hundred seventy-seven billion, four hundred thirty-one million, six hundred forty-three thousand, nine hundred forty-four".