1025681616 has 120 divisors (see below), whose sum is σ = 2989537824. Its totient is φ = 340433280.

The previous prime is 1025681561. The next prime is 1025681639. The reversal of 1025681616 is 6161865201.

1025681616 is a `hidden beast` number, since 10 + 25 + 6 + 8 + 1 + 616 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1286530 + ... + 1287326.

Almost surely, 2^1025681616 is an apocalyptic number.

1025681616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1025681616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1494768912).

1025681616 is an abundant number, since it is smaller than the sum of its proper divisors (1963856208).

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

1025681616 is an equidigital number, since it uses as much as digits as its factorization.

1025681616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1025681616 is about 32026.2644715240. The cubic root of 1025681616 is about 1008.4882838411.

The spelling of 1025681616 in words is "one billion, twenty-five million, six hundred eighty-one thousand, six hundred sixteen".