15440201401 has 12 divisors (see below), whose sum is σ = 16478745300. Its totient is φ = 14463174528.

The previous prime is 15440201377. The next prime is 15440201419. The reversal of 15440201401 is 10410204451.

It can be written as a sum of positive squares in 2 ways, for example, as 9312443001 + 6127758400 = 96501^2 + 78280^2 .

It is not a de Polignac number, because 15440201401 - 2¹¹ = 15440199353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15440205401) 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, 208156 + ... + 272413.

It is an arithmetic number, because the mean of its divisors is an integer number (1373228775).

Almost surely, 2^15440201401 is an apocalyptic number.

It is an amenable number.

15440201401 is a deficient number, since it is larger than the sum of its proper divisors (1038543899).

15440201401 is an equidigital number, since it uses as much as digits as its factorization.

15440201401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480696 (or 480677 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 15440201401 its reverse (10410204451), we get a palindrome (25850405852).

The spelling of 15440201401 in words is "fifteen billion, four hundred forty million, two hundred one thousand, four hundred one".