1398773944407 has 16 divisors (see below), whose sum is σ = 2131502831360. Its totient is φ = 799285231872.

The previous prime is 1398773944349. The next prime is 1398773944427. The reversal of 1398773944407 is 7044493778931.

It is a happy number.

It is not a de Polignac number, because 1398773944407 - 2¹¹ = 1398773942359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398773944427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687303 + ... + 1808295.

It is an arithmetic number, because the mean of its divisors is an integer number (133218926960).

Almost surely, 2^{1398773944407} is an apocalyptic number.

1398773944407 is a deficient number, since it is larger than the sum of its proper divisors (732728886953).

1398773944407 is a wasteful number, since it uses less digits than its factorization.

1398773944407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180422.

The product of its (nonzero) digits is 128024064, while the sum is 66.

The spelling of 1398773944407 in words is "one trillion, three hundred ninety-eight billion, seven hundred seventy-three million, nine hundred forty-four thousand, four hundred seven".