646763061 has 8 divisors (see below), whose sum is σ = 985543744. Its totient is φ = 369578880.

The previous prime is 646763041. The next prime is 646763087. The reversal of 646763061 is 160367646.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 646763061 - 2¹⁴ = 646746677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646763041) 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, 15399100 + ... + 15399141.

It is an arithmetic number, because the mean of its divisors is an integer number (123192968).

Almost surely, 2^646763061 is an apocalyptic number.

It is an amenable number.

646763061 is a deficient number, since it is larger than the sum of its proper divisors (338780683).

646763061 is a wasteful number, since it uses less digits than its factorization.

646763061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30798251.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 646763061 is about 25431.5367408263. The cubic root of 646763061 is about 864.7987819796.

The spelling of 646763061 in words is "six hundred forty-six million, seven hundred sixty-three thousand, sixty-one".