68680807940 has 24 divisors (see below), whose sum is σ = 144235994112. Its totient is φ = 27471123680.

The previous prime is 68680807903. The next prime is 68680807963. The reversal of 68680807940 is 4970808686.

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, 503357 + ... + 625083.

It is an arithmetic number, because the mean of its divisors is an integer number (6009833088).

Almost surely, 2^68680807940 is an apocalyptic number.

It is an amenable number.

68680807940 is an abundant number, since it is smaller than the sum of its proper divisors (75555186172).

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

68680807940 is a wasteful number, since it uses less digits than its factorization.

68680807940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149947 (or 149945 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 68680807940 in words is "sixty-eight billion, six hundred eighty million, eight hundred seven thousand, nine hundred forty".