1400311344640 has 160 divisors (see below), whose sum is σ = 3617871941376. Its totient is φ = 516732026880.

The previous prime is 1400311344517. The next prime is 1400311344647. The reversal of 1400311344640 is 464431130041.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400311344647) 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, 60657900 + ... + 60680980.

Almost surely, 2^{1400311344640} is an apocalyptic number.

1400311344640 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 1400311344640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1808935970688).

1400311344640 is an abundant number, since it is smaller than the sum of its proper divisors (2217560596736).

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

1400311344640 is a wasteful number, since it uses less digits than its factorization.

1400311344640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24940 (or 24924 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 1400311344640 its reverse (464431130041), we get a palindrome (1864742474681).

The spelling of 1400311344640 in words is "one trillion, four hundred billion, three hundred eleven million, three hundred forty-four thousand, six hundred forty".