1985400419976 has 40 divisors (see below), whose sum is σ = 5560959511470. Its totient is φ = 661800139776.

The previous prime is 1985400419941. The next prime is 1985400420089. The reversal of 1985400419976 is 6799140045891.

1985400419976 is a `hidden beast` number, since 1 + 9 + 8 + 540 + 0 + 4 + 19 + 9 + 76 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1455087312900 + 530313107076 = 1206270^2 + 728226^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1531944121 + ... + 1531945416.

Almost surely, 2^{1985400419976} is an apocalyptic number.

It is an amenable number.

1985400419976 is an abundant number, since it is smaller than the sum of its proper divisors (3575559091494).

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

1985400419976 is a wasteful number, since it uses less digits than its factorization.

1985400419976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063889555 (or 3063889542 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 1985400419976 in words is "one trillion, nine hundred eighty-five billion, four hundred million, four hundred nineteen thousand, nine hundred seventy-six".