2125438207656 has 64 divisors (see below), whose sum is σ = 5595078720000. Its totient is φ = 670972579776.

The previous prime is 2125438207609. The next prime is 2125438207679. The reversal of 2125438207656 is 6567028345212.

It is a junction number, because it is equal to n+sod(n) for n = 2125438207599 and 2125438207608.

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, 647115 + ... + 2160933.

It is an arithmetic number, because the mean of its divisors is an integer number (87423105000).

Almost surely, 2^{2125438207656} is an apocalyptic number.

It is an amenable number.

2125438207656 is an abundant number, since it is smaller than the sum of its proper divisors (3469640512344).

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

2125438207656 is a wasteful number, since it uses less digits than its factorization.

2125438207656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516926 (or 1516922 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 2125438207656 in words is "two trillion, one hundred twenty-five billion, four hundred thirty-eight million, two hundred seven thousand, six hundred fifty-six".