40289561532 has 144 divisors (see below), whose sum is σ = 112726373760. Its totient is φ = 12031171200.

The previous prime is 40289561489. The next prime is 40289561549. The reversal of 40289561532 is 23516598204.

40289561532 is a `hidden beast` number, since 4 + 0 + 2 + 89 + 561 + 5 + 3 + 2 = 666.

It is a congruent number.

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, 15150819 + ... + 15153477.

It is an arithmetic number, because the mean of its divisors is an integer number (782822040).

Almost surely, 2^40289561532 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 40289561532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56363186880).

40289561532 is an abundant number, since it is smaller than the sum of its proper divisors (72436812228).

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

40289561532 is a wasteful number, since it uses less digits than its factorization.

40289561532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224 (or 3219 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 40289561532 in words is "forty billion, two hundred eighty-nine million, five hundred sixty-one thousand, five hundred thirty-two".