1987912303550 has 24 divisors (see below), whose sum is σ = 3697554356256. Its totient is φ = 795156863040.

The previous prime is 1987912303511. The next prime is 1987912303607. The reversal of 1987912303550 is 553032197891.

It is a junction number, because it is equal to n+sod(n) for n = 1987912303492 and 1987912303501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8519234 + ... + 8749466.

It is an arithmetic number, because the mean of its divisors is an integer number (154064764844).

Almost surely, 2^{1987912303550} is an apocalyptic number.

1987912303550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1987912303550 is a deficient number, since it is larger than the sum of its proper divisors (1709642052706).

1987912303550 is a wasteful number, since it uses less digits than its factorization.

1987912303550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402932 (or 402927 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 53.

The spelling of 1987912303550 in words is "one trillion, nine hundred eighty-seven billion, nine hundred twelve million, three hundred three thousand, five hundred fifty".