615181995013 has 2 divisors, whose sum is σ = 615181995014. Its totient is φ = 615181995012.

The previous prime is 615181994951. The next prime is 615181995037. The reversal of 615181995013 is 310599181516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 436204769764 + 178977225249 = 660458^2 + 423057^2 .

It is a cyclic number.

It is not a de Polignac number, because 615181995013 - 2²¹ = 615179897861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (615181995053) 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 as a sum of consecutive naturals, namely, 307590997506 + 307590997507.

It is an arithmetic number, because the mean of its divisors is an integer number (307590997507).

Almost surely, 2^615181995013 is an apocalyptic number.

It is an amenable number.

615181995013 is a deficient number, since it is larger than the sum of its proper divisors (1).

615181995013 is an equidigital number, since it uses as much as digits as its factorization.

615181995013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 49.

The spelling of 615181995013 in words is "six hundred fifteen billion, one hundred eighty-one million, nine hundred ninety-five thousand, thirteen".