15400401443 has 12 divisors (see below), whose sum is σ = 17936462232. Its totient is φ = 13184347680.

The previous prime is 15400401403. The next prime is 15400401449. The reversal of 15400401443 is 34410400451.

It is a happy number.

It is not a de Polignac number, because 15400401443 - 2²² = 15396207139 is a prime.

It is a super-3 number, since 3×15400401443³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15400401449) 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, 149498 + ... + 230543.

It is an arithmetic number, because the mean of its divisors is an integer number (1494705186).

Almost surely, 2^15400401443 is an apocalyptic number.

15400401443 is a deficient number, since it is larger than the sum of its proper divisors (2536060789).

15400401443 is an equidigital number, since it uses as much as digits as its factorization.

15400401443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380882 (or 380875 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 15400401443 its reverse (34410400451), we get a palindrome (49810801894).

The spelling of 15400401443 in words is "fifteen billion, four hundred million, four hundred one thousand, four hundred forty-three".