615561010481 has 2 divisors, whose sum is σ = 615561010482. Its totient is φ = 615561010480.

The previous prime is 615561010469. The next prime is 615561010507. The reversal of 615561010481 is 184010165516.

615561010481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 532146906256 + 83414104225 = 729484^2 + 288815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-615561010481 is a prime.

It is a super-2 number, since 2×615561010481² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (615561018481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307780505240 + 307780505241.

It is an arithmetic number, because the mean of its divisors is an integer number (307780505241).

Almost surely, 2^615561010481 is an apocalyptic number.

It is an amenable number.

615561010481 is a deficient number, since it is larger than the sum of its proper divisors (1).

615561010481 is an equidigital number, since it uses as much as digits as its factorization.

615561010481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 38.

Adding to 615561010481 its reverse (184010165516), we get a palindrome (799571175997).

The spelling of 615561010481 in words is "six hundred fifteen billion, five hundred sixty-one million, ten thousand, four hundred eighty-one".