1812573621600 has 576 divisors, whose sum is σ = 6889959014400. Its totient is φ = 413726208000.

The previous prime is 1812573621589. The next prime is 1812573621653. The reversal of 1812573621600 is 61263752181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 947502244 + ... + 947504156.

It is an arithmetic number, because the mean of its divisors is an integer number (11961734400).

Almost surely, 2^{1812573621600} is an apocalyptic number.

1812573621600 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 1812573621600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3444979507200).

1812573621600 is an abundant number, since it is smaller than the sum of its proper divisors (5077385392800).

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

1812573621600 is a wasteful number, since it uses less digits than its factorization.

1812573621600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108 (or 3081 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 1812573621600 in words is "one trillion, eight hundred twelve billion, five hundred seventy-three million, six hundred twenty-one thousand, six hundred".