50540994789961 has 9 divisors (see below), whose sum is σ = 54727922836839. Its totient is φ = 46653140649336.

The previous prime is 50540994789953. The next prime is 50540994789977. The reversal of 50540994789961 is 16998749904505.

It is a happy number.

The square root of 50540994789961 is 7109219.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7476478519225 + 43064516270736 = 2734315^2 + 6562356^2 .

It is not a de Polignac number, because 50540994789961 - 2³ = 50540994789953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50540994789941) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 92146416 + ... + 92693278.

Almost surely, 2^{50540994789961} is an apocalyptic number.

50540994789961 is the 7109219-th square number.

50540994789961 is the 3554610-th centered octagonal number.

It is an amenable number.

50540994789961 is a deficient number, since it is larger than the sum of its proper divisors (4186928046878).

50540994789961 is an frugal number, since it uses more digits than its factorization.

50540994789961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093752 (or 546876 counting only the distinct ones).

The product of its (nonzero) digits is 881798400, while the sum is 76.

The spelling of 50540994789961 in words is "fifty trillion, five hundred forty billion, nine hundred ninety-four million, seven hundred eighty-nine thousand, nine hundred sixty-one".