40355655665 has 16 divisors (see below), whose sum is σ = 52164040656. Its totient is φ = 29794176000.

The previous prime is 40355655661. The next prime is 40355655709. The reversal of 40355655665 is 56655655304.

It can be written as a sum of positive squares in 8 ways, for example, as 1665945856 + 38689709809 = 40816^2 + 196697^2 .

It is not a de Polignac number, because 40355655665 - 2² = 40355655661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40355655661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218765 + ... + 358565.

It is an arithmetic number, because the mean of its divisors is an integer number (3260252541).

Almost surely, 2^40355655665 is an apocalyptic number.

It is an amenable number.

40355655665 is a deficient number, since it is larger than the sum of its proper divisors (11808384991).

40355655665 is a wasteful number, since it uses less digits than its factorization.

40355655665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144260.

The product of its (nonzero) digits is 8100000, while the sum is 50.

The spelling of 40355655665 in words is "forty billion, three hundred fifty-five million, six hundred fifty-five thousand, six hundred sixty-five".