1618440081350 has 48 divisors (see below), whose sum is σ = 3030106047408. Its totient is φ = 643118087040.

The previous prime is 1618440081317. The next prime is 1618440081389. The reversal of 1618440081350 is 531800448161.

It is a junction number, because it is equal to n+sod(n) for n = 1618440081298 and 1618440081307.

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 23 ways as a sum of consecutive naturals, for example, 42975629 + ... + 43013271.

It is an arithmetic number, because the mean of its divisors is an integer number (63127209321).

Almost surely, 2^{1618440081350} is an apocalyptic number.

1618440081350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1618440081350 is a deficient number, since it is larger than the sum of its proper divisors (1411665966058).

1618440081350 is a wasteful number, since it uses less digits than its factorization.

1618440081350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43289 (or 43284 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 1618440081350 in words is "one trillion, six hundred eighteen billion, four hundred forty million, eighty-one thousand, three hundred fifty".