64047162154561 has 4 divisors (see below), whose sum is σ = 64070060677972. Its totient is φ = 64024263631152.

The previous prime is 64047162154541. The next prime is 64047162154607. The reversal of 64047162154561 is 16545126174046.

It is a happy number.

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 50406364865536 + 13640797289025 = 7099744^2 + 3693345^2 .

It is a cyclic number.

It is not a de Polignac number, because 64047162154561 - 2¹⁵ = 64047162121793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64047162154499 and 64047162154508.

It is not an unprimeable number, because it can be changed into a prime (64047162154511) 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, 11449257510 + ... + 11449263103.

It is an arithmetic number, because the mean of its divisors is an integer number (16017515169493).

Almost surely, 2^{64047162154561} is an apocalyptic number.

It is an amenable number.

64047162154561 is a deficient number, since it is larger than the sum of its proper divisors (22898523411).

64047162154561 is a wasteful number, since it uses less digits than its factorization.

64047162154561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22898523410.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 64047162154561 in words is "sixty-four trillion, forty-seven billion, one hundred sixty-two million, one hundred fifty-four thousand, five hundred sixty-one".