40388993602 has 4 divisors (see below), whose sum is σ = 60583490406. Its totient is φ = 20194496800.

The previous prime is 40388993597. The next prime is 40388993609. The reversal of 40388993602 is 20639988304.

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

It can be written as a sum of positive squares in only one way, i.e., 35637510841 + 4751482761 = 188779^2 + 68931^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40388993602.

It is not an unprimeable number, because it can be changed into a prime (40388993609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10097248399 + ... + 10097248402.

Almost surely, 2^40388993602 is an apocalyptic number.

40388993602 is a deficient number, since it is larger than the sum of its proper divisors (20194496804).

40388993602 is a wasteful number, since it uses less digits than its factorization.

40388993602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20194496803.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 40388993602 in words is "forty billion, three hundred eighty-eight million, nine hundred ninety-three thousand, six hundred two".