1985541465600 has 5400 divisors, whose sum is σ = 10472531980680. Its totient is φ = 367873228800.

The previous prime is 1985541465599. The next prime is 1985541465629. The reversal of 1985541465600 is 65641455891.

It is a happy number.

1985541465600 is a `hidden beast` number, since 1 + 9 + 8 + 5 + 541 + 46 + 56 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (5400).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 539 ways as a sum of consecutive naturals, for example, 104502182391 + ... + 104502182409.

Almost surely, 2^{1985541465600} is an apocalyptic number.

1985541465600 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 1985541465600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5236265990340).

1985541465600 is an abundant number, since it is smaller than the sum of its proper divisors (8486990515080).

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

1985541465600 is a wasteful number, since it uses less digits than its factorization.

1985541465600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 54.

The spelling of 1985541465600 in words is "one trillion, nine hundred eighty-five billion, five hundred forty-one million, four hundred sixty-five thousand, six hundred".