40247643640 has 16 divisors (see below), whose sum is σ = 90557198280. Its totient is φ = 16099057440.

The previous prime is 40247643619. The next prime is 40247643641. The reversal of 40247643640 is 4634674204.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1006191091 = 40247643640 / (4 + 0 + 2 + 4 + 7 + 6 + 4 + 3 + 6 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 40247643593 and 40247643602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40247643641) 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, 503095506 + ... + 503095585.

Almost surely, 2^40247643640 is an apocalyptic number.

40247643640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40247643640 is an abundant number, since it is smaller than the sum of its proper divisors (50309554640).

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

40247643640 is a wasteful number, since it uses less digits than its factorization.

40247643640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006191102 (or 1006191098 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 40.

The spelling of 40247643640 in words is "forty billion, two hundred forty-seven million, six hundred forty-three thousand, six hundred forty".