1011551344000 has 128 divisors (see below), whose sum is σ = 2576311920000. Its totient is φ = 394751488000.

The previous prime is 1011551343997. The next prime is 1011551344043. The reversal of 1011551344000 is 4431551101.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×1011551344000² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115000 + ... + 1426999.

It is an arithmetic number, because the mean of its divisors is an integer number (20127436875).

Almost surely, 2^{1011551344000} is an apocalyptic number.

1011551344000 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 1011551344000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1288155960000).

1011551344000 is an abundant number, since it is smaller than the sum of its proper divisors (1564760576000).

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

1011551344000 is an equidigital number, since it uses as much as digits as its factorization.

1011551344000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542069 (or 1542047 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 1011551344000 its reverse (4431551101), we get a palindrome (1015982895101).

The spelling of 1011551344000 in words is "one trillion, eleven billion, five hundred fifty-one million, three hundred forty-four thousand".