615650644242 has 12 divisors (see below), whose sum is σ = 1333909729230. Its totient is φ = 205216881408.

The previous prime is 615650644201. The next prime is 615650644261. The reversal of 615650644242 is 242446056516.

615650644242 is a `hidden beast` number, since 6 + 1 + 565 + 0 + 6 + 4 + 42 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 518499364761 + 97151279481 = 720069^2 + 311691^2 .

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 17101406767 + ... + 17101406802.

Almost surely, 2^615650644242 is an apocalyptic number.

615650644242 is an abundant number, since it is smaller than the sum of its proper divisors (718259084988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

615650644242 is a wasteful number, since it uses less digits than its factorization.

615650644242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34202813577 (or 34202813574 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 615650644242 in words is "six hundred fifteen billion, six hundred fifty million, six hundred forty-four thousand, two hundred forty-two".