378728621559 has 12 divisors (see below), whose sum is σ = 547727004552. Its totient is φ = 252174416400.

The previous prime is 378728621549. The next prime is 378728621639. The reversal of 378728621559 is 955126827873.

378728621559 is a `hidden beast` number, since 3 + 7 + 8 + 72 + 8 + 6 + 2 + 1 + 559 = 666.

It is not a de Polignac number, because 378728621559 - 2¹⁶ = 378728556023 is a prime.

It is a super-3 number, since 3×378728621559³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 378728621496 and 378728621505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378728621549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25936572 + ... + 25951169.

It is an arithmetic number, because the mean of its divisors is an integer number (45643917046).

Almost surely, 2^378728621559 is an apocalyptic number.

378728621559 is a deficient number, since it is larger than the sum of its proper divisors (168998382993).

378728621559 is a wasteful number, since it uses less digits than its factorization.

378728621559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51888558 (or 51888555 counting only the distinct ones).

The product of its digits is 50803200, while the sum is 63.

The spelling of 378728621559 in words is "three hundred seventy-eight billion, seven hundred twenty-eight million, six hundred twenty-one thousand, five hundred fifty-nine".