40531632544 has 96 divisors (see below), whose sum is σ = 87316983936. Its totient is φ = 18407101440.

The previous prime is 40531632541. The next prime is 40531632553. The reversal of 40531632544 is 44523613504.

It is not an unprimeable number, because it can be changed into a prime (40531632541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19994859 + ... + 19996885.

It is an arithmetic number, because the mean of its divisors is an integer number (909551916).

Almost surely, 2^40531632544 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 40531632544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43658491968).

40531632544 is an abundant number, since it is smaller than the sum of its proper divisors (46785351392).

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

40531632544 is a wasteful number, since it uses less digits than its factorization.

40531632544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2798 (or 2790 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 37.

The spelling of 40531632544 in words is "forty billion, five hundred thirty-one million, six hundred thirty-two thousand, five hundred forty-four".