1045356581680 has 80 divisors (see below), whose sum is σ = 2573978897664. Its totient is φ = 393992881920.

The previous prime is 1045356581669. The next prime is 1045356581681. The reversal of 1045356581680 is 861856535401.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (1045356581681) by changing a digit.

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, 4116486 + ... + 4363045.

Almost surely, 2^{1045356581680} is an apocalyptic number.

1045356581680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1045356581680 is an abundant number, since it is smaller than the sum of its proper divisors (1528622315984).

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

1045356581680 is a wasteful number, since it uses less digits than its factorization.

1045356581680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8479634 (or 8479628 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 52.

The spelling of 1045356581680 in words is "one trillion, forty-five billion, three hundred fifty-six million, five hundred eighty-one thousand, six hundred eighty".