57621170721320 has 128 divisors (see below), whose sum is σ = 130293639987840. Its totient is φ = 22934008796160.

The previous prime is 57621170721287. The next prime is 57621170721343. The reversal of 57621170721320 is 2312707112675.

57621170721320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 7590861²-1.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10369111982 + ... + 10369117538.

It is an arithmetic number, because the mean of its divisors is an integer number (1017919062405).

Almost surely, 2^{57621170721320} is an apocalyptic number.

It is an amenable number.

57621170721320 is an abundant number, since it is smaller than the sum of its proper divisors (72672469266520).

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

57621170721320 is a wasteful number, since it uses less digits than its factorization.

57621170721320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7515 (or 7511 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 44.

Adding to 57621170721320 its reverse (2312707112675), we get a palindrome (59933877833995).

The spelling of 57621170721320 in words is "fifty-seven trillion, six hundred twenty-one billion, one hundred seventy million, seven hundred twenty-one thousand, three hundred twenty".