1986550995 has 32 divisors (see below), whose sum is σ = 3734164224. Its totient is φ = 889084800.

The previous prime is 1986550981. The next prime is 1986551029. The reversal of 1986550995 is 5990556891.

It is not a de Polignac number, because 1986550995 - 2⁶ = 1986550931 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 460921 + ... + 465210.

It is an arithmetic number, because the mean of its divisors is an integer number (116692632).

Almost surely, 2^1986550995 is an apocalyptic number.

1986550995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1986550995 is a deficient number, since it is larger than the sum of its proper divisors (1747613229).

1986550995 is a wasteful number, since it uses less digits than its factorization.

1986550995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926163.

The product of its (nonzero) digits is 4374000, while the sum is 57.

The square root of 1986550995 is about 44570.7414679182. The cubic root of 1986550995 is about 1257.0905818022.

The spelling of 1986550995 in words is "one billion, nine hundred eighty-six million, five hundred fifty thousand, nine hundred ninety-five".