1600000025 has 24 divisors (see below), whose sum is σ = 2142118104. Its totient is φ = 1178496000.

The previous prime is 1600000021. The next prime is 1600000069. The reversal of 1600000025 is 5200000061.

It can be written as a sum of positive squares in 12 ways, for example, as 559227904 + 1040772121 = 23648^2 + 32261^2 .

It is not a de Polignac number, because 1600000025 - 2² = 1600000021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1599999955 and 1600000009.

It is not an unprimeable number, because it can be changed into a prime (1600000021) 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, 124187 + ... + 136463.

It is an arithmetic number, because the mean of its divisors is an integer number (89254921).

Almost surely, 2^1600000025 is an apocalyptic number.

It is an amenable number.

1600000025 is a deficient number, since it is larger than the sum of its proper divisors (542118079).

1600000025 is a wasteful number, since it uses less digits than its factorization.

1600000025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12701 (or 12696 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 1600000025 is about 40000.0003125000. Note that the first 3 decimals coincide. The cubic root of 1600000025 is about 1169.6071013769.

Adding to 1600000025 its reverse (5200000061), we get a palindrome (6800000086).

It can be divided in two parts, 16000000 and 25, that multiplied together give a square (400000000 = 20000²).

The spelling of 1600000025 in words is "one billion, six hundred million, twenty-five", and thus it is an aban number.