64930187777465 has 4 divisors (see below), whose sum is σ = 77916225332964. Its totient is φ = 51944150221968.

The previous prime is 64930187777459. The next prime is 64930187777471. The reversal of 64930187777465 is 56477778103946.

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

It is an interprime number because it is at equal distance from previous prime (64930187777459) and next prime (64930187777471).

It can be written as a sum of positive squares in 2 ways, for example, as 33545688594496 + 31384499182969 = 5791864^2 + 5602187^2 .

It is a cyclic number.

It is not a de Polignac number, because 64930187777465 - 2⁶ = 64930187777401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64930187777392 and 64930187777401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6493018777742 + ... + 6493018777751.

It is an arithmetic number, because the mean of its divisors is an integer number (19479056333241).

Almost surely, 2^{64930187777465} is an apocalyptic number.

It is an amenable number.

64930187777465 is a deficient number, since it is larger than the sum of its proper divisors (12986037555499).

64930187777465 is a wasteful number, since it uses less digits than its factorization.

64930187777465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12986037555498.

The product of its (nonzero) digits is 1493614080, while the sum is 74.

The spelling of 64930187777465 in words is "sixty-four trillion, nine hundred thirty billion, one hundred eighty-seven million, seven hundred seventy-seven thousand, four hundred sixty-five".