11478741459661 has 12 divisors (see below), whose sum is σ = 13362165951420. Its totient is φ = 9832036011840.

The previous prime is 11478741459629. The next prime is 11478741459709. The reversal of 11478741459661 is 16695414787411.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4356215994025 + 7122525465636 = 2087155^2 + 2668806^2 .

It is not a de Polignac number, because 11478741459661 - 2⁵ = 11478741459629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11478741459593 and 11478741459602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11478741459961) 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, 81896400 + ... + 82036441.

It is an arithmetic number, because the mean of its divisors is an integer number (1113513829285).

Almost surely, 2^{11478741459661} is an apocalyptic number.

It is an amenable number.

11478741459661 is a deficient number, since it is larger than the sum of its proper divisors (1883424491759).

11478741459661 is a wasteful number, since it uses less digits than its factorization.

11478741459661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163934284 (or 163934277 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 64.

The spelling of 11478741459661 in words is "eleven trillion, four hundred seventy-eight billion, seven hundred forty-one million, four hundred fifty-nine thousand, six hundred sixty-one".