64638101 has 8 divisors (see below), whose sum is σ = 71671008. Its totient is φ = 57798000.

The previous prime is 64638061. The next prime is 64638103. The reversal of 64638101 is 10183646.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64638101 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 (64638103) 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, 47495 + ... + 48836.

It is an arithmetic number, because the mean of its divisors is an integer number (8958876).

Almost surely, 2^64638101 is an apocalyptic number.

64638101 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

64638101 is the 3596-th centered decagonal number.

It is an amenable number.

64638101 is a deficient number, since it is larger than the sum of its proper divisors (7032907).

64638101 is a wasteful number, since it uses less digits than its factorization.

64638101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96403.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 64638101 is about 8039.7823975528. The cubic root of 64638101 is about 401.3249832855.

The spelling of 64638101 in words is "sixty-four million, six hundred thirty-eight thousand, one hundred one".