2138738064650 has 96 divisors (see below), whose sum is σ = 4607101644480. Its totient is φ = 730041984000.

The previous prime is 2138738064637. The next prime is 2138738064737. The reversal of 2138738064650 is 564608378312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2138738064592 and 2138738064601.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3241880 + ... + 3845420.

It is an arithmetic number, because the mean of its divisors is an integer number (47990642130).

Almost surely, 2^{2138738064650} is an apocalyptic number.

2138738064650 is an abundant number, since it is smaller than the sum of its proper divisors (2468363579830).

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

2138738064650 is a wasteful number, since it uses less digits than its factorization.

2138738064650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603960 (or 603955 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 2138738064650 in words is "two trillion, one hundred thirty-eight billion, seven hundred thirty-eight million, sixty-four thousand, six hundred fifty".