68572781635 has 8 divisors (see below), whose sum is σ = 82523120400. Its totient is φ = 54701037024.

The previous prime is 68572781623. The next prime is 68572781681. The reversal of 68572781635 is 53618727586.

It is a happy number.

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 68572781635 - 2³¹ = 66425297987 is a prime.

It is a super-2 number, since 2×68572781635² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68572781635.

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, 19646617 + ... + 19650106.

It is an arithmetic number, because the mean of its divisors is an integer number (10315390050).

Almost surely, 2^68572781635 is an apocalyptic number.

68572781635 is a deficient number, since it is larger than the sum of its proper divisors (13950338765).

68572781635 is a wasteful number, since it uses less digits than its factorization.

68572781635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39297077.

The product of its digits is 16934400, while the sum is 58.

The spelling of 68572781635 in words is "sixty-eight billion, five hundred seventy-two million, seven hundred eighty-one thousand, six hundred thirty-five".