15400215552146 has 8 divisors (see below), whose sum is σ = 23100367460940. Its totient is φ = 7700093065168.

The previous prime is 15400215552107. The next prime is 15400215552191. The reversal of 15400215552146 is 64125551200451.

It can be written as a sum of positive squares in 2 ways, for example, as 15160860753025 + 239354799121 = 3893695^2 + 489239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5996681 + ... + 8170716.

Almost surely, 2^{15400215552146} is an apocalyptic number.

15400215552146 is a deficient number, since it is larger than the sum of its proper divisors (7700151908794).

15400215552146 is a wasteful number, since it uses less digits than its factorization.

15400215552146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14710908.

The product of its (nonzero) digits is 240000, while the sum is 41.

Adding to 15400215552146 its reverse (64125551200451), we get a palindrome (79525766752597).

The spelling of 15400215552146 in words is "fifteen trillion, four hundred billion, two hundred fifteen million, five hundred fifty-two thousand, one hundred forty-six".