68722631516 has 72 divisors (see below), whose sum is σ = 152806300416. Its totient is φ = 26741981280.

The previous prime is 68722631501. The next prime is 68722631557. The reversal of 68722631516 is 61513622786.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1763741 + ... + 1802283.

It is an arithmetic number, because the mean of its divisors is an integer number (2122309728).

Almost surely, 2^68722631516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68722631516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76403150208).

68722631516 is an abundant number, since it is smaller than the sum of its proper divisors (84083668900).

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

68722631516 is a wasteful number, since it uses less digits than its factorization.

68722631516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39399 (or 39390 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The spelling of 68722631516 in words is "sixty-eight billion, seven hundred twenty-two million, six hundred thirty-one thousand, five hundred sixteen".