68781560 has 32 divisors (see below), whose sum is σ = 159753600. Its totient is φ = 26624640.

The previous prime is 68781547. The next prime is 68781589. The reversal of 68781560 is 6518786.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26495 + ... + 28974.

It is an arithmetic number, because the mean of its divisors is an integer number (4992300).

Almost surely, 2^68781560 is an apocalyptic number.

It is an amenable number.

68781560 is an abundant number, since it is smaller than the sum of its proper divisors (90972040).

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

68781560 is a wasteful number, since it uses less digits than its factorization.

68781560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55511 (or 55507 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 68781560 is about 8293.4648971344. The cubic root of 68781560 is about 409.7233112363.

The spelling of 68781560 in words is "sixty-eight million, seven hundred eighty-one thousand, five hundred sixty".