50396578906 has 4 divisors (see below), whose sum is σ = 75594868362. Its totient is φ = 25198289452.

The previous prime is 50396578901. The next prime is 50396578907. The reversal of 50396578906 is 60987569305.

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., 49822257681 + 574321225 = 223209^2 + 23965^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (50396578901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12599144725 + ... + 12599144728.

Almost surely, 2^50396578906 is an apocalyptic number.

50396578906 is a deficient number, since it is larger than the sum of its proper divisors (25198289456).

50396578906 is a wasteful number, since it uses less digits than its factorization.

50396578906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25198289455.

The product of its (nonzero) digits is 12247200, while the sum is 58.

The spelling of 50396578906 in words is "fifty billion, three hundred ninety-six million, five hundred seventy-eight thousand, nine hundred six".