40632737640 has 128 divisors (see below), whose sum is σ = 133054686720. Its totient is φ = 9844819200.

The previous prime is 40632737597. The next prime is 40632737647. The reversal of 40632737640 is 4673723604.

It is a junction number, because it is equal to n+sod(n) for n = 40632737592 and 40632737601.

It is not an unprimeable number, because it can be changed into a prime (40632737647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2646867 + ... + 2662173.

It is an arithmetic number, because the mean of its divisors is an integer number (1039489740).

Almost surely, 2^40632737640 is an apocalyptic number.

40632737640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40632737640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66527343360).

40632737640 is an abundant number, since it is smaller than the sum of its proper divisors (92421949080).

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

40632737640 is a wasteful number, since it uses less digits than its factorization.

40632737640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17343 (or 17339 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 42.

The spelling of 40632737640 in words is "forty billion, six hundred thirty-two million, seven hundred thirty-seven thousand, six hundred forty".