1189878495840 has 384 divisors, whose sum is σ = 4315173004800. Its totient is φ = 305862359040.

The previous prime is 1189878495787. The next prime is 1189878495853. The reversal of 1189878495840 is 485948789811.

1189878495840 is a `hidden beast` number, since 1 + 1 + 8 + 98 + 7 + 8 + 495 + 8 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 80547655 + ... + 80562425.

It is an arithmetic number, because the mean of its divisors is an integer number (11237429700).

Almost surely, 2^{1189878495840} is an apocalyptic number.

1189878495840 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 1189878495840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2157586502400).

1189878495840 is an abundant number, since it is smaller than the sum of its proper divisors (3125294508960).

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

1189878495840 is a wasteful number, since it uses less digits than its factorization.

1189878495840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15467 (or 15453 counting only the distinct ones).

The product of its (nonzero) digits is 185794560, while the sum is 72.

The spelling of 1189878495840 in words is "one trillion, one hundred eighty-nine billion, eight hundred seventy-eight million, four hundred ninety-five thousand, eight hundred forty".