1011115644 has 96 divisors (see below), whose sum is σ = 2947262976. Its totient is φ = 262106880.

The previous prime is 1011115603. The next prime is 1011115657. The reversal of 1011115644 is 4465111101.

1011115644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 735742 + ... + 737114.

It is an arithmetic number, because the mean of its divisors is an integer number (30700656).

Almost surely, 2^1011115644 is an apocalyptic number.

1011115644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1011115644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473631488).

1011115644 is an abundant number, since it is smaller than the sum of its proper divisors (1936147332).

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

1011115644 is a wasteful number, since it uses less digits than its factorization.

1011115644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195 (or 2193 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 1011115644 is about 31798.0446568653. The cubic root of 1011115644 is about 1003.6915702069.

Adding to 1011115644 its reverse (4465111101), we get a palindrome (5476226745).

The spelling of 1011115644 in words is "one billion, eleven million, one hundred fifteen thousand, six hundred forty-four".