42651720672 has 48 divisors (see below), whose sum is σ = 122139021312. Its totient is φ = 12924763520.

The previous prime is 42651720653. The next prime is 42651720673. The reversal of 42651720672 is 27602715624.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42651720673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20193888 + ... + 20195999.

It is an arithmetic number, because the mean of its divisors is an integer number (2544562944).

Almost surely, 2^42651720672 is an apocalyptic number.

It is an amenable number.

42651720672 is an abundant number, since it is smaller than the sum of its proper divisors (79487300640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42651720672 is a wasteful number, since it uses less digits than its factorization.

42651720672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40389911 (or 40389903 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 42651720672 in words is "forty-two billion, six hundred fifty-one million, seven hundred twenty thousand, six hundred seventy-two".