1863604552680 has 512 divisors, whose sum is σ = 6854335488000. Its totient is φ = 447483294720.

The previous prime is 1863604552609. The next prime is 1863604552699. The reversal of 1863604552680 is 862554063681.

1863604552680 is a `hidden beast` number, since 1 + 8 + 6 + 3 + 6 + 0 + 4 + 552 + 6 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 627263595 + ... + 627266565.

It is an arithmetic number, because the mean of its divisors is an integer number (13387374000).

Almost surely, 2^{1863604552680} is an apocalyptic number.

1863604552680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1863604552680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3427167744000).

1863604552680 is an abundant number, since it is smaller than the sum of its proper divisors (4990730935320).

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

1863604552680 is a wasteful number, since it uses less digits than its factorization.

1863604552680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4086 (or 4076 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The spelling of 1863604552680 in words is "one trillion, eight hundred sixty-three billion, six hundred four million, five hundred fifty-two thousand, six hundred eighty".