42547621671 has 24 divisors (see below), whose sum is σ = 64717913520. Its totient is φ = 26861538816.

The previous prime is 42547621663. The next prime is 42547621717. The reversal of 42547621671 is 17612674524.

42547621671 is a `hidden beast` number, since 42 + 547 + 6 + 2 + 1 + 67 + 1 = 666.

It is not a de Polignac number, because 42547621671 - 2³ = 42547621663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42547625671) by changing a digit.

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, 395425 + ... + 491381.

It is an arithmetic number, because the mean of its divisors is an integer number (2696579730).

Almost surely, 2^42547621671 is an apocalyptic number.

42547621671 is a deficient number, since it is larger than the sum of its proper divisors (22170291849).

42547621671 is a wasteful number, since it uses less digits than its factorization.

42547621671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98575 (or 98572 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The spelling of 42547621671 in words is "forty-two billion, five hundred forty-seven million, six hundred twenty-one thousand, six hundred seventy-one".