1916137986 has 32 divisors (see below), whose sum is σ = 4381289088. Its totient is φ = 547274880.

The previous prime is 1916137961. The next prime is 1916137987. The reversal of 1916137986 is 6897316191.

It is not an unprimeable number, because it can be changed into a prime (1916137987) 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, 148056 + ... + 160476.

It is an arithmetic number, because the mean of its divisors is an integer number (136915284).

Almost surely, 2^1916137986 is an apocalyptic number.

1916137986 is an abundant number, since it is smaller than the sum of its proper divisors (2465151102).

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

1916137986 is a wasteful number, since it uses less digits than its factorization.

1916137986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16106.

The product of its digits is 489888, while the sum is 51.

The square root of 1916137986 is about 43773.7134134174. The cubic root of 1916137986 is about 1242.0590974911.

The spelling of 1916137986 in words is "one billion, nine hundred sixteen million, one hundred thirty-seven thousand, nine hundred eighty-six".