1918009710644 has 12 divisors (see below), whose sum is σ = 3369279417504. Its totient is φ = 955358448504.

The previous prime is 1918009710641. The next prime is 1918009710653. The reversal of 1918009710644 is 4460179008191.

It is a super-2 number, since 2×1918009710644² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1918009710592 and 1918009710601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918009710641) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 911600522 + ... + 911602625.

It is an arithmetic number, because the mean of its divisors is an integer number (280773284792).

Almost surely, 2^{1918009710644} is an apocalyptic number.

It is an amenable number.

1918009710644 is a deficient number, since it is larger than the sum of its proper divisors (1451269706860).

1918009710644 is a wasteful number, since it uses less digits than its factorization.

1918009710644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823203414 (or 1823203412 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 1918009710644 in words is "one trillion, nine hundred eighteen billion, nine million, seven hundred ten thousand, six hundred forty-four".