1406660512400 has 480 divisors, whose sum is σ = 4104408551040. Its totient is φ = 456486912000.

The previous prime is 1406660512393. The next prime is 1406660512423. The reversal of 1406660512400 is 42150666041.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 205859384 + ... + 205866216.

It is an arithmetic number, because the mean of its divisors is an integer number (8550851148).

Almost surely, 2^{1406660512400} is an apocalyptic number.

1406660512400 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 1406660512400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2052204275520).

1406660512400 is an abundant number, since it is smaller than the sum of its proper divisors (2697748038640).

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

1406660512400 is a wasteful number, since it uses less digits than its factorization.

1406660512400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6995 (or 6984 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 1406660512400 in words is "one trillion, four hundred six billion, six hundred sixty million, five hundred twelve thousand, four hundred".