990144005140431 has 12 divisors (see below), whose sum is σ = 1430499708081808. Its totient is φ = 659961372354624.

The previous prime is 990144005140331. The next prime is 990144005140463. The reversal of 990144005140431 is 134041500441099.

It is a happy number.

990144005140431 is a `hidden beast` number, since 9 + 90 + 1 + 4 + 4 + 0 + 0 + 514 + 0 + 43 + 1 = 666.

It is not a de Polignac number, because 990144005140431 - 2¹⁴ = 990144005124047 is a prime.

It is a super-2 number, since 2×990144005140431² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990144005140331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11219209450 + ... + 11219297703.

Almost surely, 2^{990144005140431} is an apocalyptic number.

990144005140431 is a deficient number, since it is larger than the sum of its proper divisors (440355702941377).

990144005140431 is a wasteful number, since it uses less digits than its factorization.

990144005140431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22438512062 (or 22438512059 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 990144005140431 in words is "nine hundred ninety trillion, one hundred forty-four billion, five million, one hundred forty thousand, four hundred thirty-one".