647078141870746 has 4 divisors (see below), whose sum is σ = 970617212806122. Its totient is φ = 323539070935372.

The previous prime is 647078141870723. The next prime is 647078141870747.

It is a happy number.

647078141870746 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 637942569125625 + 9135572745121 = 25257525^2 + 3022511^2 .

It is a super-3 number, since 3×647078141870746³ (a number of 45 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (647078141870747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161769535467685 + ... + 161769535467688.

Almost surely, 2^{647078141870746} is an apocalyptic number.

647078141870746 is a deficient number, since it is larger than the sum of its proper divisors (323539070935376).

647078141870746 is a wasteful number, since it uses less digits than its factorization.

647078141870746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323539070935375.

The product of its (nonzero) digits is 354041856, while the sum is 70.

The spelling of 647078141870746 in words is "six hundred forty-seven trillion, seventy-eight billion, one hundred forty-one million, eight hundred seventy thousand, seven hundred forty-six".