13815540061 has 2 divisors, whose sum is σ = 13815540062. Its totient is φ = 13815540060.

The previous prime is 13815540007. The next prime is 13815540083. The reversal of 13815540061 is 16004551831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13086216025 + 729324036 = 114395^2 + 27006^2 .

It is an emirp because it is prime and its reverse (16004551831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13815540061 - 2¹¹ = 13815538013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13815539999 and 13815540026.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13815547061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6907770030 + 6907770031.

It is an arithmetic number, because the mean of its divisors is an integer number (6907770031).

Almost surely, 2^13815540061 is an apocalyptic number.

It is an amenable number.

13815540061 is a deficient number, since it is larger than the sum of its proper divisors (1).

13815540061 is an equidigital number, since it uses as much as digits as its factorization.

13815540061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 13815540061 in words is "thirteen billion, eight hundred fifteen million, five hundred forty thousand, sixty-one".