12173777642 has 16 divisors (see below), whose sum is σ = 19670606592. Its totient is φ = 5617159920.

The previous prime is 12173777611. The next prime is 12173777653. The reversal of 12173777642 is 24677737121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39167 + ... + 160877.

It is an arithmetic number, because the mean of its divisors is an integer number (1229412912).

Almost surely, 2^12173777642 is an apocalyptic number.

12173777642 is a deficient number, since it is larger than the sum of its proper divisors (7496828950).

12173777642 is a wasteful number, since it uses less digits than its factorization.

12173777642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125573.

The product of its digits is 691488, while the sum is 47.

The spelling of 12173777642 in words is "twelve billion, one hundred seventy-three million, seven hundred seventy-seven thousand, six hundred forty-two".