378706765740521 has 8 divisors (see below), whose sum is σ = 378847192674240. Its totient is φ = 378566342139312.

The previous prime is 378706765740503. The next prime is 378706765740553. The reversal of 378706765740521 is 125047567607873.

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-378706765740521 is a prime.

It is a super-3 number, since 3×378706765740521³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378706765740581) 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, 239296796 + ... + 240874178.

It is an arithmetic number, because the mean of its divisors is an integer number (47355899084280).

Almost surely, 2^{378706765740521} is an apocalyptic number.

It is an amenable number.

378706765740521 is a deficient number, since it is larger than the sum of its proper divisors (140426933719).

378706765740521 is a wasteful number, since it uses less digits than its factorization.

378706765740521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666255.

The product of its (nonzero) digits is 414892800, while the sum is 68.

The spelling of 378706765740521 in words is "three hundred seventy-eight trillion, seven hundred six billion, seven hundred sixty-five million, seven hundred forty thousand, five hundred twenty-one".