1985963574854 has 32 divisors (see below), whose sum is σ = 3420724694016. Its totient is φ = 847080037440.

The previous prime is 1985963574853. The next prime is 1985963574923. The reversal of 1985963574854 is 4584753695891.

It is a super-2 number, since 2×1985963574854² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985963574853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3275657 + ... + 3834299.

It is an arithmetic number, because the mean of its divisors is an integer number (106897646688).

Almost surely, 2^{1985963574854} is an apocalyptic number.

1985963574854 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1985963574854 is a deficient number, since it is larger than the sum of its proper divisors (1434761119162).

1985963574854 is a wasteful number, since it uses less digits than its factorization.

1985963574854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559860.

The product of its digits is 1306368000, while the sum is 74.

The spelling of 1985963574854 in words is "one trillion, nine hundred eighty-five billion, nine hundred sixty-three million, five hundred seventy-four thousand, eight hundred fifty-four".