1009644552 has 96 divisors (see below), whose sum is σ = 3308947200. Its totient is φ = 271498752.

The previous prime is 1009644533. The next prime is 1009644563. The reversal of 1009644552 is 2554469001.

1009644552 is a `hidden beast` number, since 1 + 0 + 0 + 9 + 644 + 5 + 5 + 2 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50352 + ... + 67487.

It is an arithmetic number, because the mean of its divisors is an integer number (34468200).

Almost surely, 2^1009644552 is an apocalyptic number.

1009644552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1009644552 is an abundant number, since it is smaller than the sum of its proper divisors (2299302648).

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

1009644552 is a wasteful number, since it uses less digits than its factorization.

1009644552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117875 (or 117868 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1009644552 is about 31774.9044373071. The cubic root of 1009644552 is about 1003.2045704255.

Subtracting from 1009644552 its sum of digits (36), we obtain a triangular number (1009644516 = T₄₄₉₃₆).

The spelling of 1009644552 in words is "one billion, nine million, six hundred forty-four thousand, five hundred fifty-two".