1065994553520 has 960 divisors, whose sum is σ = 4157918697600. Its totient is φ = 250590412800.

The previous prime is 1065994553483. The next prime is 1065994553527. The reversal of 1065994553520 is 253554995601.

1065994553520 is a `hidden beast` number, since 1 + 0 + 6 + 599 + 45 + 5 + 3 + 5 + 2 + 0 = 666.

It is a super-2 number, since 2×1065994553520² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1065994553527) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1069201662 + ... + 1069202658.

It is an arithmetic number, because the mean of its divisors is an integer number (4331165310).

Almost surely, 2^{1065994553520} is an apocalyptic number.

1065994553520 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 1065994553520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2078959348800).

1065994553520 is an abundant number, since it is smaller than the sum of its proper divisors (3091924144080).

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

1065994553520 is a wasteful number, since it uses less digits than its factorization.

1065994553520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175 (or 1150 counting only the distinct ones).

The product of its (nonzero) digits is 7290000, while the sum is 54.

The spelling of 1065994553520 in words is "one trillion, sixty-five billion, nine hundred ninety-four million, five hundred fifty-three thousand, five hundred twenty".