1061644025 has 12 divisors (see below), whose sum is σ = 1417703532. Its totient is φ = 783983040.

The previous prime is 1061644013. The next prime is 1061644039. The reversal of 1061644025 is 5204461601.

It can be written as a sum of positive squares in 6 ways, for example, as 375623161 + 686020864 = 19381^2 + 26192^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1061644025 is a prime.

It is a super-2 number, since 2×1061644025² = 2254176071636401250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1632974 + ... + 1633623.

It is an arithmetic number, because the mean of its divisors is an integer number (118141961).

Almost surely, 2^1061644025 is an apocalyptic number.

It is an amenable number.

1061644025 is a deficient number, since it is larger than the sum of its proper divisors (356059507).

1061644025 is a wasteful number, since it uses less digits than its factorization.

1061644025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3266620 (or 3266615 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1061644025 is about 32582.8793233502. The cubic root of 1061644025 is about 1020.1396787441.

The spelling of 1061644025 in words is "one billion, sixty-one million, six hundred forty-four thousand, twenty-five".