1986134156 has 6 divisors (see below), whose sum is σ = 3475734780. Its totient is φ = 993067076.

The previous prime is 1986134119. The next prime is 1986134167. The reversal of 1986134156 is 6514316891.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248266766 + ... + 248266773.

It is an arithmetic number, because the mean of its divisors is an integer number (579289130).

Almost surely, 2^1986134156 is an apocalyptic number.

It is an amenable number.

1986134156 is a deficient number, since it is larger than the sum of its proper divisors (1489600624).

1986134156 is a wasteful number, since it uses less digits than its factorization.

1986134156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496533543 (or 496533541 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 1986134156 is about 44566.0650719805. The cubic root of 1986134156 is about 1257.0026503342.

The spelling of 1986134156 in words is "one billion, nine hundred eighty-six million, one hundred thirty-four thousand, one hundred fifty-six".