1854352880640 has 880 divisors, whose sum is σ = 7331515385040. Its totient is φ = 445269934080.

The previous prime is 1854352880609. The next prime is 1854352880657. The reversal of 1854352880640 is 460882534581.

1854352880640 is a `hidden beast` number, since 1 + 8 + 54 + 3 + 528 + 8 + 0 + 64 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 208900187136 + 1645452693504 = 457056^2 + 1282752^2 .

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 79 ways as a sum of consecutive naturals, for example, 221041566 + ... + 221049954.

It is an arithmetic number, because the mean of its divisors is an integer number (8331267483).

Almost surely, 2^{1854352880640} is an apocalyptic number.

1854352880640 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 1854352880640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3665757692520).

1854352880640 is an abundant number, since it is smaller than the sum of its proper divisors (5477162504400).

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

1854352880640 is a wasteful number, since it uses less digits than its factorization.

1854352880640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8480 (or 8453 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 54.

The spelling of 1854352880640 in words is "one trillion, eight hundred fifty-four billion, three hundred fifty-two million, eight hundred eighty thousand, six hundred forty".