1061645544 has 48 divisors (see below), whose sum is σ = 2929551300. Its totient is φ = 347203584.

The previous prime is 1061645531. The next prime is 1061645567. The reversal of 1061645544 is 4455461601.

1061645544 is a `hidden beast` number, since 1 + 0 + 6 + 1 + 645 + 5 + 4 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1058721444 + 2924100 = 32538^2 + 1710^2 .

It is a super-2 number, since 2×1061645544² = 2254182522190111872, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1061645499 and 1061645508.

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, 135289 + ... + 142920.

Almost surely, 2^1061645544 is an apocalyptic number.

It is an amenable number.

1061645544 is an abundant number, since it is smaller than the sum of its proper divisors (1867905756).

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

1061645544 is a wasteful number, since it uses less digits than its factorization.

1061645544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278274 (or 278267 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 1061645544 is about 32582.9026331295. The cubic root of 1061645544 is about 1020.1401652824.

The spelling of 1061645544 in words is "one billion, sixty-one million, six hundred forty-five thousand, five hundred forty-four".