1955812387200 has 384 divisors, whose sum is σ = 7394727064320. Its totient is φ = 445070008320.

The previous prime is 1955812387183. The next prime is 1955812387201. The reversal of 1955812387200 is 27832185591.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955812387201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15190294 + ... + 15318506.

It is an arithmetic number, because the mean of its divisors is an integer number (19257101730).

Almost surely, 2^{1955812387200} is an apocalyptic number.

1955812387200 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 1955812387200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3697363532160).

1955812387200 is an abundant number, since it is smaller than the sum of its proper divisors (5438914677120).

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

1955812387200 is a wasteful number, since it uses less digits than its factorization.

1955812387200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128474 (or 128457 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 1955812387200 in words is "one trillion, nine hundred fifty-five billion, eight hundred twelve million, three hundred eighty-seven thousand, two hundred".