2120738686136 has 64 divisors (see below), whose sum is σ = 4761866188800. Its totient is φ = 865733476608.

The previous prime is 2120738686123. The next prime is 2120738686141. The reversal of 2120738686136 is 6316868370212.

It is a happy number.

It is a super-2 number, since 2×2120738686136² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3136805 + ... + 3752468.

It is an arithmetic number, because the mean of its divisors is an integer number (74404159200).

Almost surely, 2^{2120738686136} is an apocalyptic number.

It is an amenable number.

2120738686136 is an abundant number, since it is smaller than the sum of its proper divisors (2641127502664).

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

2120738686136 is a wasteful number, since it uses less digits than its factorization.

2120738686136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6889548 (or 6889544 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 2120738686136 in words is "two trillion, one hundred twenty billion, seven hundred thirty-eight million, six hundred eighty-six thousand, one hundred thirty-six".