2139223069656 has 96 divisors (see below), whose sum is σ = 5846895213120. Its totient is φ = 706557297600.

The previous prime is 2139223069651. The next prime is 2139223069679. The reversal of 2139223069656 is 6569603229312.

It is a happy number.

2139223069656 is a `hidden beast` number, since 213 + 92 + 230 + 69 + 6 + 56 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139223069651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3609271 + ... + 4159961.

It is an arithmetic number, because the mean of its divisors is an integer number (60905158470).

Almost surely, 2^{2139223069656} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139223069656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2923447606560).

2139223069656 is an abundant number, since it is smaller than the sum of its proper divisors (3707672143464).

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

2139223069656 is a wasteful number, since it uses less digits than its factorization.

2139223069656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551197 (or 551190 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 54.

The spelling of 2139223069656 in words is "two trillion, one hundred thirty-nine billion, two hundred twenty-three million, sixty-nine thousand, six hundred fifty-six".