1878776000640 has 2688 divisors, whose sum is σ = 8857946211840. Its totient is φ = 376233984000.

The previous prime is 1878776000603. The next prime is 1878776000659. The reversal of 1878776000640 is 460006778781.

It is a tau number, because it is divible by the number of its divisors (2688).

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 335 ways as a sum of consecutive naturals, for example, 7795750920 + ... + 7795751160.

Almost surely, 2^{1878776000640} is an apocalyptic number.

1878776000640 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 1878776000640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4428973105920).

1878776000640 is an abundant number, since it is smaller than the sum of its proper divisors (6979170211200).

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

1878776000640 is a wasteful number, since it uses less digits than its factorization.

1878776000640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The spelling of 1878776000640 in words is "one trillion, eight hundred seventy-eight billion, seven hundred seventy-six million, six hundred forty", and thus it is an aban number.