31554520040 has 64 divisors (see below), whose sum is σ = 72767842560. Its totient is φ = 12307438080.

The previous prime is 31554520003. The next prime is 31554520073. The reversal of 31554520040 is 4002545513.

It is a junction number, because it is equal to n+sod(n) for n = 31554519985 and 31554520012.

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, 4101077 + ... + 4108763.

It is an arithmetic number, because the mean of its divisors is an integer number (1136997540).

Almost surely, 2^31554520040 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 31554520040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36383921280).

31554520040 is an abundant number, since it is smaller than the sum of its proper divisors (41213322520).

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

31554520040 is a wasteful number, since it uses less digits than its factorization.

31554520040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10242 (or 10238 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The spelling of 31554520040 in words is "thirty-one billion, five hundred fifty-four million, five hundred twenty thousand, forty".