378701645717 has 4 divisors (see below), whose sum is σ = 378722894796. Its totient is φ = 378680396640.

The previous prime is 378701645711. The next prime is 378701645759. The reversal of 378701645717 is 717546107873.

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 293432389636 + 85269256081 = 541694^2 + 292009^2 .

It is a cyclic number.

It is not a de Polignac number, because 378701645717 - 2¹² = 378701641621 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 (378701645711) 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, 10597784 + ... + 10633457.

It is an arithmetic number, because the mean of its divisors is an integer number (94680723699).

Almost surely, 2^378701645717 is an apocalyptic number.

It is an amenable number.

378701645717 is a deficient number, since it is larger than the sum of its proper divisors (21249079).

378701645717 is a wasteful number, since it uses less digits than its factorization.

378701645717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21249078.

The product of its (nonzero) digits is 6914880, while the sum is 56.

The spelling of 378701645717 in words is "three hundred seventy-eight billion, seven hundred one million, six hundred forty-five thousand, seven hundred seventeen".