42465545657 has 4 divisors (see below), whose sum is σ = 42841347060. Its totient is φ = 42089744256.

The previous prime is 42465545651. The next prime is 42465545711. The reversal of 42465545657 is 75654556424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6570075136 + 35895470521 = 81056^2 + 189461^2 .

It is a cyclic number.

It is not a de Polignac number, because 42465545657 - 2¹⁶ = 42465480121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42465545599 and 42465545608.

It is not an unprimeable number, because it can be changed into a prime (42465545651) 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 in 3 ways as a sum of consecutive naturals, for example, 187900532 + ... + 187900757.

It is an arithmetic number, because the mean of its divisors is an integer number (10710336765).

Almost surely, 2^42465545657 is an apocalyptic number.

It is an amenable number.

42465545657 is a deficient number, since it is larger than the sum of its proper divisors (375801403).

42465545657 is a wasteful number, since it uses less digits than its factorization.

42465545657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375801402.

The product of its digits is 20160000, while the sum is 53.

The spelling of 42465545657 in words is "forty-two billion, four hundred sixty-five million, five hundred forty-five thousand, six hundred fifty-seven".