1220994192618 has 40 divisors (see below), whose sum is σ = 2753357803812. Its totient is φ = 404405711424.

The previous prime is 1220994192577. The next prime is 1220994192637. The reversal of 1220994192618 is 8162914990221.

1220994192618 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 9 + 9 + 4 + 19 + 2 + 618 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1151537171409 + 69457021209 = 1073097^2 + 263547^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23977755 + ... + 24028622.

Almost surely, 2^{1220994192618} is an apocalyptic number.

1220994192618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1220994192618 is an abundant number, since it is smaller than the sum of its proper divisors (1532363611194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220994192618 is a wasteful number, since it uses less digits than its factorization.

1220994192618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48006548 (or 48006539 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 1220994192618 in words is "one trillion, two hundred twenty billion, nine hundred ninety-four million, one hundred ninety-two thousand, six hundred eighteen".