1040321421544 has 16 divisors (see below), whose sum is σ = 1950625397700. Its totient is φ = 520154648832.

The previous prime is 1040321421541. The next prime is 1040321421547. The reversal of 1040321421544 is 4451241230401.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1040321421541) and next prime (1040321421547).

It can be written as a sum of positive squares in 2 ways, for example, as 947760660900 + 92560760644 = 973530^2 + 304238^2 .

It is not an unprimeable number, because it can be changed into a prime (1040321421541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18384 + ... + 1442560.

Almost surely, 2^{1040321421544} is an apocalyptic number.

It is an amenable number.

1040321421544 is a deficient number, since it is larger than the sum of its proper divisors (910303976156).

1040321421544 is a wasteful number, since it uses less digits than its factorization.

1040321421544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515492 (or 1515488 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 1040321421544 its reverse (4451241230401), we get a palindrome (5491562651945).

The spelling of 1040321421544 in words is "one trillion, forty billion, three hundred twenty-one million, four hundred twenty-one thousand, five hundred forty-four".