64626202061 has 4 divisors (see below), whose sum is σ = 64663755324. Its totient is φ = 64588648800.

The previous prime is 64626202037. The next prime is 64626202099. The reversal of 64626202061 is 16020262646.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28719741961 + 35906460100 = 169469^2 + 189490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64626202061 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 (64626222061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18774050 + ... + 18777491.

It is an arithmetic number, because the mean of its divisors is an integer number (16165938831).

Almost surely, 2^64626202061 is an apocalyptic number.

It is an amenable number.

64626202061 is a deficient number, since it is larger than the sum of its proper divisors (37553263).

64626202061 is a wasteful number, since it uses less digits than its factorization.

64626202061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37553262.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 64626202061 in words is "sixty-four billion, six hundred twenty-six million, two hundred two thousand, sixty-one".