40688809730 has 8 divisors (see below), whose sum is σ = 73239857532. Its totient is φ = 16275523888.

The previous prime is 40688809703. The next prime is 40688809739. The reversal of 40688809730 is 3790888604.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37037387401 + 3651422329 = 192451^2 + 60427^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (40688809739) 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, 2034440477 + ... + 2034440496.

Almost surely, 2^40688809730 is an apocalyptic number.

40688809730 is a deficient number, since it is larger than the sum of its proper divisors (32551047802).

40688809730 is a wasteful number, since it uses less digits than its factorization.

40688809730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4068880980.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 40688809730 in words is "forty billion, six hundred eighty-eight million, eight hundred nine thousand, seven hundred thirty".