42671755645 has 16 divisors (see below), whose sum is σ = 52181971632. Its totient is φ = 33487068160.

The previous prime is 42671755627. The next prime is 42671755649. The reversal of 42671755645 is 54655717624.

It can be written as a sum of positive squares in 8 ways, for example, as 4475743801 + 38196011844 = 66901^2 + 195438^2 .

It is not a de Polignac number, because 42671755645 - 2⁵ = 42671755613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42671755592 and 42671755601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42671755649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1846965 + ... + 1869925.

It is an arithmetic number, because the mean of its divisors is an integer number (3261373227).

Almost surely, 2^42671755645 is an apocalyptic number.

It is an amenable number.

42671755645 is a deficient number, since it is larger than the sum of its proper divisors (9510215987).

42671755645 is a wasteful number, since it uses less digits than its factorization.

42671755645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30032.

The product of its digits is 7056000, while the sum is 52.

The spelling of 42671755645 in words is "forty-two billion, six hundred seventy-one million, seven hundred fifty-five thousand, six hundred forty-five".