615563660212 has 6 divisors (see below), whose sum is σ = 1077236405378. Its totient is φ = 307781830104.

The previous prime is 615563660189. The next prime is 615563660213. The reversal of 615563660212 is 212066365516.

It can be written as a sum of positive squares in only one way, i.e., 562149054756 + 53414605456 = 749766^2 + 231116^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615563660213) 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, 76945457523 + ... + 76945457530.

Almost surely, 2^615563660212 is an apocalyptic number.

It is an amenable number.

615563660212 is a deficient number, since it is larger than the sum of its proper divisors (461672745166).

615563660212 is a wasteful number, since it uses less digits than its factorization.

615563660212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153890915057 (or 153890915055 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 615563660212 in words is "six hundred fifteen billion, five hundred sixty-three million, six hundred sixty thousand, two hundred twelve".