1618861861430 has 16 divisors (see below), whose sum is σ = 3178856019024. Its totient is φ = 588677040480.

The previous prime is 1618861861427. The next prime is 1618861861483. The reversal of 1618861861430 is 341681688161.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7358462897 + ... + 7358463116.

It is an arithmetic number, because the mean of its divisors is an integer number (198678501189).

Almost surely, 2^{1618861861430} is an apocalyptic number.

1618861861430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1618861861430 is a deficient number, since it is larger than the sum of its proper divisors (1559994157594).

1618861861430 is a wasteful number, since it uses less digits than its factorization.

1618861861430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14716926031.

The product of its (nonzero) digits is 1327104, while the sum is 53.

The spelling of 1618861861430 in words is "one trillion, six hundred eighteen billion, eight hundred sixty-one million, eight hundred sixty-one thousand, four hundred thirty".