40992474636 has 72 divisors (see below), whose sum is σ = 105096962880. Its totient is φ = 13469923584.

The previous prime is 40992474623. The next prime is 40992474637. The reversal of 40992474636 is 63647429904.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (40992474637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1846096 + ... + 1868168.

It is an arithmetic number, because the mean of its divisors is an integer number (1459680040).

Almost surely, 2^40992474636 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 40992474636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52548481440).

40992474636 is an abundant number, since it is smaller than the sum of its proper divisors (64104488244).

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

40992474636 is a wasteful number, since it uses less digits than its factorization.

40992474636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22815 (or 22810 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 54.

The spelling of 40992474636 in words is "forty billion, nine hundred ninety-two million, four hundred seventy-four thousand, six hundred thirty-six".