68637130621 has 8 divisors (see below), whose sum is σ = 72259642400. Its totient is φ = 65015622000.

The previous prime is 68637130619. The next prime is 68637130631. The reversal of 68637130621 is 12603173686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68637130621 - 2¹ = 68637130619 is a prime.

It is a super-2 number, since 2×68637130621² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68637130631) 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, 108255 + ... + 385996.

It is an arithmetic number, because the mean of its divisors is an integer number (9032455300).

Almost surely, 2^68637130621 is an apocalyptic number.

It is an amenable number.

68637130621 is a deficient number, since it is larger than the sum of its proper divisors (3622511779).

68637130621 is a wasteful number, since it uses less digits than its factorization.

68637130621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501579.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 68637130621 in words is "sixty-eight billion, six hundred thirty-seven million, one hundred thirty thousand, six hundred twenty-one".