245378136394 has 4 divisors (see below), whose sum is σ = 368067204594. Its totient is φ = 122689068196.

The previous prime is 245378136379. The next prime is 245378136403. The reversal of 245378136394 is 493631873542.

It is a happy number.

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., 160210469169 + 85167667225 = 400263^2 + 291835^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61344534097 + ... + 61344534100.

Almost surely, 2^245378136394 is an apocalyptic number.

245378136394 is a deficient number, since it is larger than the sum of its proper divisors (122689068200).

245378136394 is a wasteful number, since it uses less digits than its factorization.

245378136394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122689068199.

The product of its digits is 13063680, while the sum is 55.

The spelling of 245378136394 in words is "two hundred forty-five billion, three hundred seventy-eight million, one hundred thirty-six thousand, three hundred ninety-four".