1001055644 has 6 divisors (see below), whose sum is σ = 1751847384. Its totient is φ = 500527820.

The previous prime is 1001055637. The next prime is 1001055691. The reversal of 1001055644 is 4465501001.

It is a super-2 number, since 2×1001055644² = 2004224804768509472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125131952 + ... + 125131959.

It is an arithmetic number, because the mean of its divisors is an integer number (291974564).

Almost surely, 2^1001055644 is an apocalyptic number.

It is an amenable number.

1001055644 is a deficient number, since it is larger than the sum of its proper divisors (750791740).

1001055644 is a wasteful number, since it uses less digits than its factorization.

1001055644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250263915 (or 250263913 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1001055644 is about 31639.4633962082. The cubic root of 1001055644 is about 1000.3517575854.

Adding to 1001055644 its reverse (4465501001), we get a palindrome (5466556645).

The spelling of 1001055644 in words is "one billion, one million, fifty-five thousand, six hundred forty-four".