64630859077 has 8 divisors (see below), whose sum is σ = 67100887800. Its totient is φ = 62176922304.

The previous prime is 64630859057. The next prime is 64630859081. The reversal of 64630859077 is 77095803646.

It is a happy number.

It is a Cunningham number, because it is equal to 254226²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 11139958116 + 53490900961 = 105546^2 + 231281^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 64630859077 - 2⁷ = 64630858949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64630859047) 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, 4014802 + ... + 4030867.

It is an arithmetic number, because the mean of its divisors is an integer number (8387610975).

Almost surely, 2^64630859077 is an apocalyptic number.

It is an amenable number.

64630859077 is a deficient number, since it is larger than the sum of its proper divisors (2470028723).

64630859077 is a wasteful number, since it uses less digits than its factorization.

64630859077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8045975.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 64630859077 in words is "sixty-four billion, six hundred thirty million, eight hundred fifty-nine thousand, seventy-seven".