1878409386364 has 72 divisors (see below), whose sum is σ = 3836558325600. Its totient is φ = 802372644864.

The previous prime is 1878409386349. The next prime is 1878409386457. The reversal of 1878409386364 is 4636839048781.

It is a self number, because there is not a number n which added to its sum of digits gives 1878409386364.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85088832 + ... + 85110904.

It is an arithmetic number, because the mean of its divisors is an integer number (53285532300).

Almost surely, 2^{1878409386364} is an apocalyptic number.

1878409386364 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1878409386364 is an abundant number, since it is smaller than the sum of its proper divisors (1958148939236).

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

1878409386364 is a wasteful number, since it uses less digits than its factorization.

1878409386364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23507 (or 23498 counting only the distinct ones).

The product of its (nonzero) digits is 167215104, while the sum is 67.

The spelling of 1878409386364 in words is "one trillion, eight hundred seventy-eight billion, four hundred nine million, three hundred eighty-six thousand, three hundred sixty-four".