1878655680 has 420 divisors, whose sum is σ = 7357719600. Its totient is φ = 454671360.

The previous prime is 1878655643. The next prime is 1878655693. The reversal of 1878655680 is 865568781.

1878655680 is a `hidden beast` number, since 1 + 8 + 7 + 8 + 6 + 556 + 80 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3136021 + ... + 3136619.

It is an arithmetic number, because the mean of its divisors is an integer number (17518380).

Almost surely, 2^1878655680 is an apocalyptic number.

1878655680 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 1878655680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3678859800).

1878655680 is an abundant number, since it is smaller than the sum of its proper divisors (5479063920).

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

1878655680 is a wasteful number, since it uses less digits than its factorization.

1878655680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The square root of 1878655680 is about 43343.4617906784. The cubic root of 1878655680 is about 1233.9069108732.

The spelling of 1878655680 in words is "one billion, eight hundred seventy-eight million, six hundred fifty-five thousand, six hundred eighty".