1985751916 has 24 divisors (see below), whose sum is σ = 3605328720. Its totient is φ = 955856832.

The previous prime is 1985751899. The next prime is 1985751919. The reversal of 1985751916 is 6191575891.

It is not an unprimeable number, because it can be changed into a prime (1985751919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15586 + ... + 64918.

It is an arithmetic number, because the mean of its divisors is an integer number (150222030).

Almost surely, 2^1985751916 is an apocalyptic number.

It is an amenable number.

1985751916 is a deficient number, since it is larger than the sum of its proper divisors (1619576804).

1985751916 is a wasteful number, since it uses less digits than its factorization.

1985751916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49713 (or 49711 counting only the distinct ones).

The product of its digits is 680400, while the sum is 52.

The square root of 1985751916 is about 44561.7764008573. The cubic root of 1985751916 is about 1256.9220066512.

The spelling of 1985751916 in words is "one billion, nine hundred eighty-five million, seven hundred fifty-one thousand, nine hundred sixteen".