36440431640 has 16 divisors (see below), whose sum is σ = 81990971280. Its totient is φ = 14576172640.

The previous prime is 36440431633. The next prime is 36440431649. The reversal of 36440431640 is 4613404463.

It is a self number, because there is not a number n which added to its sum of digits gives 36440431640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36440431649) 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, 455505356 + ... + 455505435.

It is an arithmetic number, because the mean of its divisors is an integer number (5124435705).

Almost surely, 2^36440431640 is an apocalyptic number.

It is an amenable number.

36440431640 is an abundant number, since it is smaller than the sum of its proper divisors (45550539640).

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

36440431640 is a wasteful number, since it uses less digits than its factorization.

36440431640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911010802 (or 911010798 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 35.

The spelling of 36440431640 in words is "thirty-six billion, four hundred forty million, four hundred thirty-one thousand, six hundred forty".