1861612387606 has 16 divisors (see below), whose sum is σ = 2796617210400. Its totient is φ = 929407046848.

The previous prime is 1861612387597. The next prime is 1861612387619. The reversal of 1861612387606 is 6067832161681.

It is a super-2 number, since 2×1861612387606² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 9666180 + ... + 9856888.

It is an arithmetic number, because the mean of its divisors is an integer number (174788575650).

Almost surely, 2^{1861612387606} is an apocalyptic number.

1861612387606 is a deficient number, since it is larger than the sum of its proper divisors (935004822794).

1861612387606 is a wasteful number, since it uses less digits than its factorization.

1861612387606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198023.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 1861612387606 in words is "one trillion, eight hundred sixty-one billion, six hundred twelve million, three hundred eighty-seven thousand, six hundred six".