31461455646 has 64 divisors (see below), whose sum is σ = 73083494400. Its totient is φ = 10020348000.

The previous prime is 31461455617. The next prime is 31461455647. The reversal of 31461455646 is 64655416413.

31461455646 is a `hidden beast` number, since 3 + 1 + 46 + 1 + 45 + 564 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31461455647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13296 + ... + 251196.

It is an arithmetic number, because the mean of its divisors is an integer number (1141929600).

Almost surely, 2^31461455646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31461455646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36541747200).

31461455646 is an abundant number, since it is smaller than the sum of its proper divisors (41622038754).

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

31461455646 is a wasteful number, since it uses less digits than its factorization.

31461455646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238022 (or 238016 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The spelling of 31461455646 in words is "thirty-one billion, four hundred sixty-one million, four hundred fifty-five thousand, six hundred forty-six".