1025663602 has 4 divisors (see below), whose sum is σ = 1538495406. Its totient is φ = 512831800.

The previous prime is 1025663591. The next prime is 1025663603. The reversal of 1025663602 is 2063665201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 637613001 + 388050601 = 25251^2 + 19699^2 .

It is a super-2 number, since 2×1025663602² = 2103971648935228808, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1025663603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256415899 + ... + 256415902.

Almost surely, 2^1025663602 is an apocalyptic number.

1025663602 is a deficient number, since it is larger than the sum of its proper divisors (512831804).

1025663602 is an equidigital number, since it uses as much as digits as its factorization.

1025663602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512831803.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1025663602 is about 32025.9832323693. The cubic root of 1025663602 is about 1008.4823797951.

The spelling of 1025663602 in words is "one billion, twenty-five million, six hundred sixty-three thousand, six hundred two".