40036198837 has 4 divisors (see below), whose sum is σ = 40037283180. Its totient is φ = 40035114496.

The previous prime is 40036198771. The next prime is 40036198861. The reversal of 40036198837 is 73889163004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28130333841 + 11905864996 = 167721^2 + 109114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40036198837 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40036198337) 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, 484762 + ... + 561307.

It is an arithmetic number, because the mean of its divisors is an integer number (10009320795).

Almost surely, 2^40036198837 is an apocalyptic number.

It is an amenable number.

40036198837 is a deficient number, since it is larger than the sum of its proper divisors (1084343).

40036198837 is a wasteful number, since it uses less digits than its factorization.

40036198837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084342.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 40036198837 in words is "forty billion, thirty-six million, one hundred ninety-eight thousand, eight hundred thirty-seven".