64651362121655 has 8 divisors (see below), whose sum is σ = 77583166539984. Its totient is φ = 51720068368000.

The previous prime is 64651362121651. The next prime is 64651362121669. The reversal of 64651362121655 is 55612126315646.

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

It is not a de Polignac number, because 64651362121655 - 2² = 64651362121651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64651362121597 and 64651362121606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64651362121651) 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, 127387586 + ... + 127894095.

It is an arithmetic number, because the mean of its divisors is an integer number (9697895817498).

Almost surely, 2^{64651362121655} is an apocalyptic number.

64651362121655 is a deficient number, since it is larger than the sum of its proper divisors (12931804418329).

64651362121655 is a wasteful number, since it uses less digits than its factorization.

64651362121655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255332337.

The product of its digits is 7776000, while the sum is 53.

The spelling of 64651362121655 in words is "sixty-four trillion, six hundred fifty-one billion, three hundred sixty-two million, one hundred twenty-one thousand, six hundred fifty-five".