2051656128 has 70 divisors (see below), whose sum is σ = 6081766856. Its totient is φ = 683883648.

The previous prime is 2051656109. The next prime is 2051656141. The reversal of 2051656128 is 8216561502.

2051656128 is a `hidden beast` number, since 20 + 5 + 16 + 5 + 612 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2051656092 and 2051656101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 192700 + ... + 203067.

Almost surely, 2^2051656128 is an apocalyptic number.

It is an amenable number.

2051656128 is an abundant number, since it is smaller than the sum of its proper divisors (4030110728).

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

2051656128 is an equidigital number, since it uses as much as digits as its factorization.

2051656128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395791 (or 395772 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 2051656128 is about 45295.2108726739. The cubic root of 2051656128 is about 1270.6760878252.

The spelling of 2051656128 in words is "two billion, fifty-one million, six hundred fifty-six thousand, one hundred twenty-eight".