15678994428241 has 9 divisors (see below), whose sum is σ = 15708855550171. Its totient is φ = 15649189984624.

The previous prime is 15678994428239. The next prime is 15678994428263. The reversal of 15678994428241 is 14282449987651.

The square root of 15678994428241 is 3959671.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2584149485841 + 13094844942400 = 1607529^2 + 3618680^2 .

It is not a de Polignac number, because 15678994428241 - 2¹ = 15678994428239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15678994428641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2253049320 + ... + 2253056278.

Almost surely, 2^{15678994428241} is an apocalyptic number.

15678994428241 is the 3959671-st square number.

15678994428241 is the 1979836-th centered octagonal number.

It is an amenable number.

15678994428241 is a deficient number, since it is larger than the sum of its proper divisors (29861121930).

15678994428241 is an frugal number, since it uses more digits than its factorization.

15678994428241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15056 (or 7528 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 70.

The spelling of 15678994428241 in words is "fifteen trillion, six hundred seventy-eight billion, nine hundred ninety-four million, four hundred twenty-eight thousand, two hundred forty-one".