378993420826 has 4 divisors (see below), whose sum is σ = 568490131242. Its totient is φ = 189496710412.

The previous prime is 378993420779. The next prime is 378993420901. The reversal of 378993420826 is 628024399873.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 226717870201 + 152275550625 = 476149^2 + 390225^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94748355205 + ... + 94748355208.

Almost surely, 2^378993420826 is an apocalyptic number.

378993420826 is a deficient number, since it is larger than the sum of its proper divisors (189496710416).

378993420826 is a wasteful number, since it uses less digits than its factorization.

378993420826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189496710415.

The product of its (nonzero) digits is 31352832, while the sum is 61.

The spelling of 378993420826 in words is "three hundred seventy-eight billion, nine hundred ninety-three million, four hundred twenty thousand, eight hundred twenty-six".