1618742886172 has 12 divisors (see below), whose sum is σ = 2832861728536. Its totient is φ = 809353820880.

The previous prime is 1618742886139. The next prime is 1618742886181. The reversal of 1618742886172 is 2716882478161.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1618742886172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4197783 + ... + 4567150.

Almost surely, 2^{1618742886172} is an apocalyptic number.

It is an amenable number.

1618742886172 is a deficient number, since it is larger than the sum of its proper divisors (1214118842364).

1618742886172 is a wasteful number, since it uses less digits than its factorization.

1618742886172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8811108 (or 8811106 counting only the distinct ones).

The product of its digits is 14450688, while the sum is 61.

The spelling of 1618742886172 in words is "one trillion, six hundred eighteen billion, seven hundred forty-two million, eight hundred eighty-six thousand, one hundred seventy-two".