1985695145280 has 3024 divisors, whose sum is σ = 9336107027520. Its totient is φ = 400062136320.

The previous prime is 1985695145237. The next prime is 1985695145293. The reversal of 1985695145280 is 825415965891.

1985695145280 is a `hidden beast` number, since 1 + 9 + 8 + 5 + 6 + 95 + 14 + 528 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (3024).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 27201303324 + ... + 27201303396.

It is an arithmetic number, because the mean of its divisors is an integer number (3087336980).

Almost surely, 2^{1985695145280} is an apocalyptic number.

1985695145280 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 1985695145280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4668053513760).

1985695145280 is an abundant number, since it is smaller than the sum of its proper divisors (7350411882240).

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

1985695145280 is a wasteful number, since it uses less digits than its factorization.

1985695145280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 63.

The spelling of 1985695145280 in words is "one trillion, nine hundred eighty-five billion, six hundred ninety-five million, one hundred forty-five thousand, two hundred eighty".