2391486671986 has 4 divisors (see below), whose sum is σ = 3587230007982. Its totient is φ = 1195743335992.

The previous prime is 2391486671953. The next prime is 2391486671989. The reversal of 2391486671986 is 6891766841932.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1621534826025 + 769951845961 = 1273395^2 + 877469^2 .

It is not an unprimeable number, because it can be changed into a prime (2391486671989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597871667995 + ... + 597871667998.

Almost surely, 2^{2391486671986} is an apocalyptic number.

2391486671986 is a deficient number, since it is larger than the sum of its proper divisors (1195743335996).

2391486671986 is a wasteful number, since it uses less digits than its factorization.

2391486671986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195743335995.

The product of its digits is 188116992, while the sum is 70.

The spelling of 2391486671986 in words is "two trillion, three hundred ninety-one billion, four hundred eighty-six million, six hundred seventy-one thousand, nine hundred eighty-six".