64273661601 has 4 divisors (see below), whose sum is σ = 85698215472. Its totient is φ = 42849107732.

The previous prime is 64273661579. The next prime is 64273661651. The reversal of 64273661601 is 10616637246.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64273661601 - 2⁶ = 64273661537 is a prime.

It is a super-2 number, since 2×64273661601² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64273661651) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10712276931 + ... + 10712276936.

It is an arithmetic number, because the mean of its divisors is an integer number (21424553868).

Almost surely, 2^64273661601 is an apocalyptic number.

It is an amenable number.

64273661601 is a deficient number, since it is larger than the sum of its proper divisors (21424553871).

64273661601 is a wasteful number, since it uses less digits than its factorization.

64273661601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21424553870.

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 64273661601 in words is "sixty-four billion, two hundred seventy-three million, six hundred sixty-one thousand, six hundred one".