378775313505 has 32 divisors (see below), whose sum is σ = 673716009600. Its totient is φ = 201912198336.

The previous prime is 378775313489. The next prime is 378775313533. The reversal of 378775313505 is 505313577873.

378775313505 is a `hidden beast` number, since 3 + 7 + 8 + 77 + 53 + 13 + 505 = 666.

It is not a de Polignac number, because 378775313505 - 2⁴ = 378775313489 is a prime.

It is a super-2 number, since 2×378775313505² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 432895 + ... + 972084.

It is an arithmetic number, because the mean of its divisors is an integer number (21053625300).

Almost surely, 2^378775313505 is an apocalyptic number.

It is an amenable number.

378775313505 is a deficient number, since it is larger than the sum of its proper divisors (294940696095).

378775313505 is a wasteful number, since it uses less digits than its factorization.

378775313505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406990 (or 1406984 counting only the distinct ones).

The product of its (nonzero) digits is 9261000, while the sum is 54.

The spelling of 378775313505 in words is "three hundred seventy-eight billion, seven hundred seventy-five million, three hundred thirteen thousand, five hundred five".