1618217818408 has 32 divisors (see below), whose sum is σ = 3051181224000. Its totient is φ = 804581916160.

The previous prime is 1618217818333. The next prime is 1618217818411. The reversal of 1618217818408 is 8048187128161.

It is a happy 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, 266328 + ... + 1818616.

It is an arithmetic number, because the mean of its divisors is an integer number (95349413250).

Almost surely, 2^{1618217818408} is an apocalyptic number.

It is an amenable number.

1618217818408 is a deficient number, since it is larger than the sum of its proper divisors (1432963405592).

1618217818408 is a wasteful number, since it uses less digits than its factorization.

1618217818408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553025 (or 1553021 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 55.

The spelling of 1618217818408 in words is "one trillion, six hundred eighteen billion, two hundred seventeen million, eight hundred eighteen thousand, four hundred eight".