1145666506446 has 192 divisors, whose sum is σ = 3306903874560. Its totient is φ = 277501178880.

The previous prime is 1145666506433. The next prime is 1145666506447. The reversal of 1145666506446 is 6446056665411.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1145666506392 and 1145666506401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145666506447) 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, 2345215 + ... + 2791301.

It is an arithmetic number, because the mean of its divisors is an integer number (17223457680).

Almost surely, 2^{1145666506446} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1145666506446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1653451937280).

1145666506446 is an abundant number, since it is smaller than the sum of its proper divisors (2161237368114).

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

1145666506446 is a wasteful number, since it uses less digits than its factorization.

1145666506446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446239 (or 446236 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 54.

The spelling of 1145666506446 in words is "one trillion, one hundred forty-five billion, six hundred sixty-six million, five hundred six thousand, four hundred forty-six".