1945811913600 has 384 divisors, whose sum is σ = 6514268417280. Its totient is φ = 510396006400.

The previous prime is 1945811913583. The next prime is 1945811913611. The reversal of 1945811913600 is 63191185491.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1945811913600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 318304144 + ... + 318310256.

It is an arithmetic number, because the mean of its divisors is an integer number (16964240670).

Almost surely, 2^{1945811913600} is an apocalyptic number.

1945811913600 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 1945811913600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3257134208640).

1945811913600 is an abundant number, since it is smaller than the sum of its proper divisors (4568456503680).

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

1945811913600 is a wasteful number, since it uses less digits than its factorization.

1945811913600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6678 (or 6661 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 48.

The spelling of 1945811913600 in words is "one trillion, nine hundred forty-five billion, eight hundred eleven million, nine hundred thirteen thousand, six hundred".