50861913994 has 4 divisors (see below), whose sum is σ = 76292870994. Its totient is φ = 25430956996.

The previous prime is 50861913989. The next prime is 50861913997. The reversal of 50861913994 is 49931916805.

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., 32107980969 + 18753933025 = 179187^2 + 136945^2 .

It is not an unprimeable number, because it can be changed into a prime (50861913997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12715478497 + ... + 12715478500.

Almost surely, 2^50861913994 is an apocalyptic number.

50861913994 is a deficient number, since it is larger than the sum of its proper divisors (25430957000).

50861913994 is a wasteful number, since it uses less digits than its factorization.

50861913994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25430956999.

The product of its (nonzero) digits is 2099520, while the sum is 55.

The spelling of 50861913994 in words is "fifty billion, eight hundred sixty-one million, nine hundred thirteen thousand, nine hundred ninety-four".