378158621518 has 16 divisors (see below), whose sum is σ = 569794244976. Its totient is φ = 188228502720.

The previous prime is 378158621513. The next prime is 378158621567. The reversal of 378158621518 is 815126851873.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378158621513) 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, 261288 + ... + 908068.

It is an arithmetic number, because the mean of its divisors is an integer number (35612140311).

Almost surely, 2^378158621518 is an apocalyptic number.

378158621518 is a deficient number, since it is larger than the sum of its proper divisors (191635623458).

378158621518 is a wasteful number, since it uses less digits than its factorization.

378158621518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648099.

The product of its digits is 3225600, while the sum is 55.

The spelling of 378158621518 in words is "three hundred seventy-eight billion, one hundred fifty-eight million, six hundred twenty-one thousand, five hundred eighteen".