1401111111440 has 40 divisors (see below), whose sum is σ = 3257677304088. Its totient is φ = 560428277760.

The previous prime is 1401111111419. The next prime is 1401111111443. The reversal of 1401111111440 is 441111111041.

It can be written as a sum of positive squares in 4 ways, for example, as 113585176576 + 1287525934864 = 337024^2 + 1134692^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1401111111440² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1401111111443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2761394 + ... + 3229166.

Almost surely, 2^{1401111111440} is an apocalyptic number.

1401111111440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401111111440 is an abundant number, since it is smaller than the sum of its proper divisors (1856566192648).

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

1401111111440 is a wasteful number, since it uses less digits than its factorization.

1401111111440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505227 (or 505221 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 1401111111440 its reverse (441111111041), we get a palindrome (1842222222481).

The spelling of 1401111111440 in words is "one trillion, four hundred one billion, one hundred eleven million, one hundred eleven thousand, four hundred forty".