1406646065440 has 144 divisors (see below), whose sum is σ = 4217198235264. Its totient is φ = 438435110400.

The previous prime is 1406646065437. The next prime is 1406646065443. The reversal of 1406646065440 is 445606466041.

It is an interprime number because it is at equal distance from previous prime (1406646065437) and next prime (1406646065443).

It is not an unprimeable number, because it can be changed into a prime (1406646065443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8069176 + ... + 8241655.

It is an arithmetic number, because the mean of its divisors is an integer number (29286098856).

Almost surely, 2^{1406646065440} is an apocalyptic number.

1406646065440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1406646065440 is an abundant number, since it is smaller than the sum of its proper divisors (2810552169824).

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

1406646065440 is a wasteful number, since it uses less digits than its factorization.

1406646065440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16310871 (or 16310856 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 1406646065440 in words is "one trillion, four hundred six billion, six hundred forty-six million, sixty-five thousand, four hundred forty".