31861040046 has 32 divisors (see below), whose sum is σ = 70296076800. Its totient is φ = 9546377280.

The previous prime is 31861040027. The next prime is 31861040087. The reversal of 31861040046 is 64004016813.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 31861039989 and 31861040016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2706166 + ... + 2717913.

It is an arithmetic number, because the mean of its divisors is an integer number (2196752400).

Almost surely, 2^31861040046 is an apocalyptic number.

31861040046 is an abundant number, since it is smaller than the sum of its proper divisors (38435036754).

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

31861040046 is a wasteful number, since it uses less digits than its factorization.

31861040046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5424184.

The product of its (nonzero) digits is 13824, while the sum is 33.

Adding to 31861040046 its reverse (64004016813), we get a palindrome (95865056859).

The spelling of 31861040046 in words is "thirty-one billion, eight hundred sixty-one million, forty thousand, forty-six".