2009542406388 has 24 divisors (see below), whose sum is σ = 5115198852960. Its totient is φ = 608952244320.

The previous prime is 2009542406381. The next prime is 2009542406437. The reversal of 2009542406388 is 8836042459002.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2009542406388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009542406381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7611902923 + ... + 7611903186.

It is an arithmetic number, because the mean of its divisors is an integer number (213133285540).

Almost surely, 2^{2009542406388} is an apocalyptic number.

It is an amenable number.

2009542406388 is an abundant number, since it is smaller than the sum of its proper divisors (3105656446572).

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

2009542406388 is a wasteful number, since it uses less digits than its factorization.

2009542406388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15223806127 (or 15223806125 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 2009542406388 in words is "two trillion, nine billion, five hundred forty-two million, four hundred six thousand, three hundred eighty-eight".