67785913490 has 32 divisors (see below), whose sum is σ = 127344116736. Its totient is φ = 25930491840.

The previous prime is 67785913477. The next prime is 67785913519. The reversal of 67785913490 is 9431958776.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1306484 + ... + 1357376.

It is an arithmetic number, because the mean of its divisors is an integer number (3979503648).

Almost surely, 2^67785913490 is an apocalyptic number.

67785913490 is a deficient number, since it is larger than the sum of its proper divisors (59558203246).

67785913490 is a wasteful number, since it uses less digits than its factorization.

67785913490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56714.

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 67785913490 in words is "sixty-seven billion, seven hundred eighty-five million, nine hundred thirteen thousand, four hundred ninety".