42107961861 has 160 divisors (see below), whose sum is σ = 82001525760. Its totient is φ = 20951529984.

The previous prime is 42107961853. The next prime is 42107961869. The reversal of 42107961861 is 16816970124.

42107961861 is a `hidden beast` number, since 4 + 21 + 0 + 7 + 9 + 618 + 6 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (42107961853) and next prime (42107961869).

It is not a de Polignac number, because 42107961861 - 2³ = 42107961853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42107961869) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 7872390 + ... + 7877736.

It is an arithmetic number, because the mean of its divisors is an integer number (512509536).

Almost surely, 2^42107961861 is an apocalyptic number.

It is an amenable number.

42107961861 is a deficient number, since it is larger than the sum of its proper divisors (39893563899).

42107961861 is a wasteful number, since it uses less digits than its factorization.

42107961861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5445 (or 5436 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 42107961861 in words is "forty-two billion, one hundred seven million, nine hundred sixty-one thousand, eight hundred sixty-one".