1055561100000 has 576 divisors, whose sum is σ = 3816799709184. Its totient is φ = 253280000000.

The previous prime is 1055561099911. The next prime is 1055561100007. The reversal of 1055561100000 is 11655501.

It is a super-2 number, since 2×1055561100000² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055561100007) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 333298417 + ... + 333301583.

It is an arithmetic number, because the mean of its divisors is an integer number (6626388384).

Almost surely, 2^{1055561100000} is an apocalyptic number.

1055561100000 is a gapful number since it is divisible by the number (10) 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 1055561100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1908399854592).

1055561100000 is an abundant number, since it is smaller than the sum of its proper divisors (2761238609184).

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

1055561100000 is a wasteful number, since it uses less digits than its factorization.

1055561100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3317 (or 3289 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 24.

Adding to 1055561100000 its reverse (11655501), we get a palindrome (1055572755501).

The spelling of 1055561100000 in words is "one trillion, fifty-five billion, five hundred sixty-one million, one hundred thousand".