42721393152 has 80 divisors (see below), whose sum is σ = 117737151840. Its totient is φ = 13749399552.

The previous prime is 42721393151. The next prime is 42721393177. The reversal of 42721393152 is 25139312724.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 42721393152.

It is not an unprimeable number, because it can be changed into a prime (42721393151) 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, 434998 + ... + 524085.

It is an arithmetic number, because the mean of its divisors is an integer number (1471714398).

Almost surely, 2^42721393152 is an apocalyptic number.

It is an amenable number.

42721393152 is an abundant number, since it is smaller than the sum of its proper divisors (75015758688).

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

42721393152 is an equidigital number, since it uses as much as digits as its factorization.

42721393152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959133 (or 959117 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The spelling of 42721393152 in words is "forty-two billion, seven hundred twenty-one million, three hundred ninety-three thousand, one hundred fifty-two".