1025771856 has 40 divisors (see below), whose sum is σ = 2659722624. Its totient is φ = 340657920.

The previous prime is 1025771849. The next prime is 1025771869. The reversal of 1025771856 is 6581775201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26421 + ... + 52436.

Almost surely, 2^1025771856 is an apocalyptic number.

1025771856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1025771856 is an abundant number, since it is smaller than the sum of its proper divisors (1633950768).

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

1025771856 is a wasteful number, since it uses less digits than its factorization.

1025771856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79139 (or 79133 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 42.

The square root of 1025771856 is about 32027.6732842085. The cubic root of 1025771856 is about 1008.5178587477.

The spelling of 1025771856 in words is "one billion, twenty-five million, seven hundred seventy-one thousand, eight hundred fifty-six".