40042061632 has 28 divisors (see below), whose sum is σ = 83640493120. Its totient is φ = 18967291776.

The previous prime is 40042061621. The next prime is 40042061639. The reversal of 40042061632 is 23616024004.

It is a self number, because there is not a number n which added to its sum of digits gives 40042061632.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40042061639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16463448 + ... + 16465879.

Almost surely, 2^40042061632 is an apocalyptic number.

It is an amenable number.

40042061632 is an abundant number, since it is smaller than the sum of its proper divisors (43598431488).

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

40042061632 is a wasteful number, since it uses less digits than its factorization.

40042061632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32929358 (or 32929348 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 40042061632 its reverse (23616024004), we get a palindrome (63658085636).

It can be divided in two parts, 4004 and 2061632, that multiplied together give a palindrome (8254774528).

The spelling of 40042061632 in words is "forty billion, forty-two million, sixty-one thousand, six hundred thirty-two".