64651022055551 has 4 divisors (see below), whose sum is σ = 64651041324192. Its totient is φ = 64651002786912.

The previous prime is 64651022055523. The next prime is 64651022055553. The reversal of 64651022055551 is 15555022015646.

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

It is a cyclic number.

It is not a de Polignac number, because 64651022055551 - 2¹⁴ = 64651022039167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64651022055496 and 64651022055505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64651022055553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3144026 + ... + 11797751.

It is an arithmetic number, because the mean of its divisors is an integer number (16162760331048).

Almost surely, 2^{64651022055551} is an apocalyptic number.

64651022055551 is a deficient number, since it is larger than the sum of its proper divisors (19268641).

64651022055551 is a wasteful number, since it uses less digits than its factorization.

64651022055551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19268640.

The product of its (nonzero) digits is 1800000, while the sum is 47.

The spelling of 64651022055551 in words is "sixty-four trillion, six hundred fifty-one billion, twenty-two million, fifty-five thousand, five hundred fifty-one".