1023111561444 has 48 divisors (see below), whose sum is σ = 2728352946816. Its totient is φ = 292311648000.

The previous prime is 1023111561431. The next prime is 1023111561473. The reversal of 1023111561444 is 4441651113201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5600344 + ... + 5780144.

It is an arithmetic number, because the mean of its divisors is an integer number (56840686392).

Almost surely, 2^{1023111561444} is an apocalyptic number.

1023111561444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1023111561444 is an abundant number, since it is smaller than the sum of its proper divisors (1705241385372).

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

1023111561444 is a wasteful number, since it uses less digits than its factorization.

1023111561444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247556 (or 247554 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

Adding to 1023111561444 its reverse (4441651113201), we get a palindrome (5464762674645).

The spelling of 1023111561444 in words is "one trillion, twenty-three billion, one hundred eleven million, five hundred sixty-one thousand, four hundred forty-four".