42641654421 has 16 divisors (see below), whose sum is σ = 61480836864. Its totient is φ = 26186279424.

The previous prime is 42641654417. The next prime is 42641654423. The reversal of 42641654421 is 12445614624.

It is not a de Polignac number, because 42641654421 - 2² = 42641654417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42641654421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42641654423) 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, 8892400 + ... + 8897193.

It is an arithmetic number, because the mean of its divisors is an integer number (3842552304).

Almost surely, 2^42641654421 is an apocalyptic number.

It is an amenable number.

42641654421 is a deficient number, since it is larger than the sum of its proper divisors (18839182443).

42641654421 is a wasteful number, since it uses less digits than its factorization.

42641654421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17789660.

The product of its digits is 184320, while the sum is 39.

The spelling of 42641654421 in words is "forty-two billion, six hundred forty-one million, six hundred fifty-four thousand, four hundred twenty-one".