1400004395661 has 16 divisors (see below), whose sum is σ = 1875596980608. Its totient is φ = 928883404800.

The previous prime is 1400004395633. The next prime is 1400004395683. The reversal of 1400004395661 is 1665934000041.

It is not a de Polignac number, because 1400004395661 - 2¹⁹ = 1400003871373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400004395861) 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, 572416 + ... + 1768521.

It is an arithmetic number, because the mean of its divisors is an integer number (117224811288).

Almost surely, 2^{1400004395661} is an apocalyptic number.

It is an amenable number.

1400004395661 is a deficient number, since it is larger than the sum of its proper divisors (475592584947).

1400004395661 is a wasteful number, since it uses less digits than its factorization.

1400004395661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341892.

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 1400004395661 in words is "one trillion, four hundred billion, four million, three hundred ninety-five thousand, six hundred sixty-one".