42565121650 has 48 divisors (see below), whose sum is σ = 81049687488. Its totient is φ = 16622424000.

The previous prime is 42565121629. The next prime is 42565121681. The reversal of 42565121650 is 5612156524.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7610355 + ... + 7615945.

It is an arithmetic number, because the mean of its divisors is an integer number (1688535156).

Almost surely, 2^42565121650 is an apocalyptic number.

42565121650 is a deficient number, since it is larger than the sum of its proper divisors (38484565838).

42565121650 is a wasteful number, since it uses less digits than its factorization.

42565121650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9187 (or 9182 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 42565121650 in words is "forty-two billion, five hundred sixty-five million, one hundred twenty-one thousand, six hundred fifty".