67906780731 has 8 divisors (see below), whose sum is σ = 100602638160. Its totient is φ = 45271187136.

The previous prime is 67906780709. The next prime is 67906780757. The reversal of 67906780731 is 13708760976.

It is not a de Polignac number, because 67906780731 - 2¹³ = 67906772539 is a prime.

It is a super-2 number, since 2×67906780731² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67906781731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1257532950 + ... + 1257533003.

It is an arithmetic number, because the mean of its divisors is an integer number (12575329770).

Almost surely, 2^67906780731 is an apocalyptic number.

67906780731 is a deficient number, since it is larger than the sum of its proper divisors (32695857429).

67906780731 is a wasteful number, since it uses less digits than its factorization.

67906780731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515065962 (or 2515065956 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 54.

The spelling of 67906780731 in words is "sixty-seven billion, nine hundred six million, seven hundred eighty thousand, seven hundred thirty-one".