1043400644405 has 16 divisors (see below), whose sum is σ = 1465850663424. Its totient is φ = 698024123520.

The previous prime is 1043400644401. The next prime is 1043400644411. The reversal of 1043400644405 is 5044460043401.

It is not a de Polignac number, because 1043400644405 - 2² = 1043400644401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043400644401) 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, 363552797 + ... + 363555666.

It is an arithmetic number, because the mean of its divisors is an integer number (91615666464).

Almost surely, 2^{1043400644405} is an apocalyptic number.

It is an amenable number.

1043400644405 is a deficient number, since it is larger than the sum of its proper divisors (422450019019).

1043400644405 is an equidigital number, since it uses as much as digits as its factorization.

1043400644405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727108516.

The product of its (nonzero) digits is 92160, while the sum is 35.

Adding to 1043400644405 its reverse (5044460043401), we get a palindrome (6087860687806).

The spelling of 1043400644405 in words is "one trillion, forty-three billion, four hundred million, six hundred forty-four thousand, four hundred five".