393013915645 has 8 divisors (see below), whose sum is σ = 507894906456. Its totient is φ = 290225660736.

The previous prime is 393013915639. The next prime is 393013915663. The reversal of 393013915645 is 546519310393.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13703277721 + 379310637924 = 117061^2 + 615882^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-393013915645 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3023183902 + ... + 3023184031.

It is an arithmetic number, because the mean of its divisors is an integer number (63486863307).

Almost surely, 2^393013915645 is an apocalyptic number.

It is an amenable number.

393013915645 is a deficient number, since it is larger than the sum of its proper divisors (114880990811).

393013915645 is a wasteful number, since it uses less digits than its factorization.

393013915645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6046367951.

The product of its (nonzero) digits is 1312200, while the sum is 49.

The spelling of 393013915645 in words is "three hundred ninety-three billion, thirteen million, nine hundred fifteen thousand, six hundred forty-five".