1618478255880 has 96 divisors (see below), whose sum is σ = 5276647935000. Its totient is φ = 430232675328.

The previous prime is 1618478255869. The next prime is 1618478255971. The reversal of 1618478255880 is 885528748161.

1618478255880 is a `hidden beast` number, since 1 + 6 + 1 + 8 + 4 + 78 + 2 + 558 + 8 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 738750564036 + 879727691844 = 859506^2 + 937938^2 .

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6977005 + ... + 7205244.

Almost surely, 2^{1618478255880} is an apocalyptic number.

1618478255880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1618478255880 is an abundant number, since it is smaller than the sum of its proper divisors (3658169679120).

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

1618478255880 is a wasteful number, since it uses less digits than its factorization.

1618478255880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14182583 (or 14182576 counting only the distinct ones).

The product of its (nonzero) digits is 34406400, while the sum is 63.

The spelling of 1618478255880 in words is "one trillion, six hundred eighteen billion, four hundred seventy-eight million, two hundred fifty-five thousand, eight hundred eighty".