67985507780 has 24 divisors (see below), whose sum is σ = 150283754880. Its totient is φ = 25762929120.

The previous prime is 67985507771. The next prime is 67985507861. The reversal of 67985507780 is 8770558976.

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, 89454236 + ... + 89454995.

It is an arithmetic number, because the mean of its divisors is an integer number (6261823120).

Almost surely, 2^67985507780 is an apocalyptic number.

It is an amenable number.

67985507780 is an abundant number, since it is smaller than the sum of its proper divisors (82298247100).

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

67985507780 is a wasteful number, since it uses less digits than its factorization.

67985507780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178909259 (or 178909257 counting only the distinct ones).

The product of its (nonzero) digits is 29635200, while the sum is 62.

The spelling of 67985507780 in words is "sixty-seven billion, nine hundred eighty-five million, five hundred seven thousand, seven hundred eighty".