1864222395840 has 896 divisors, whose sum is σ = 7715195136000. Its totient is φ = 414956224512.

The previous prime is 1864222395811. The next prime is 1864222395869. The reversal of 1864222395840 is 485932224681.

1864222395840 is a `hidden beast` number, since 1 + 8 + 6 + 4 + 2 + 22 + 39 + 584 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1864222395811) and next prime (1864222395869).

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 127 ways as a sum of consecutive naturals, for example, 388944484 + ... + 388949276.

Almost surely, 2^{1864222395840} is an apocalyptic number.

1864222395840 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 1864222395840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3857597568000).

1864222395840 is an abundant number, since it is smaller than the sum of its proper divisors (5850972740160).

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

1864222395840 is a wasteful number, since it uses less digits than its factorization.

1864222395840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4994 (or 4978 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 1864222395840 in words is "one trillion, eight hundred sixty-four billion, two hundred twenty-two million, three hundred ninety-five thousand, eight hundred forty".