1913663681280 has 1152 divisors, whose sum is σ = 8151576652800. Its totient is φ = 419980640256.

The previous prime is 1913663681257. The next prime is 1913663681309. The reversal of 1913663681280 is 821863663191.

1913663681280 is a `hidden beast` number, since 191 + 3 + 6 + 6 + 368 + 12 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

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 127 ways as a sum of consecutive naturals, for example, 145110847 + ... + 145124033.

It is an arithmetic number, because the mean of its divisors is an integer number (7076021400).

Almost surely, 2^{1913663681280} is an apocalyptic number.

1913663681280 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 1913663681280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4075788326400).

1913663681280 is an abundant number, since it is smaller than the sum of its proper divisors (6237912971520).

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

1913663681280 is a wasteful number, since it uses less digits than its factorization.

1913663681280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13266 (or 13246 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 1913663681280 in words is "one trillion, nine hundred thirteen billion, six hundred sixty-three million, six hundred eighty-one thousand, two hundred eighty".