1011100640 has 48 divisors (see below), whose sum is σ = 2605886640. Its totient is φ = 367672320.

The previous prime is 1011100639. The next prime is 1011100661. The reversal of 1011100640 is 460011101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285485 + ... + 289004.

It is an arithmetic number, because the mean of its divisors is an integer number (54289305).

Almost surely, 2^1011100640 is an apocalyptic number.

1011100640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011100640 is an abundant number, since it is smaller than the sum of its proper divisors (1594786000).

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

1011100640 is a wasteful number, since it uses less digits than its factorization.

1011100640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574515 (or 574507 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1011100640 is about 31797.8087295335. The cubic root of 1011100640 is about 1003.6866055711.

Adding to 1011100640 its reverse (460011101), we get a palindrome (1471111741).

The spelling of 1011100640 in words is "one billion, eleven million, one hundred thousand, six hundred forty".