50398866505 has 24 divisors (see below), whose sum is σ = 65511137880. Its totient is φ = 37204876800.

The previous prime is 50398866493. The next prime is 50398866517. The reversal of 50398866505 is 50566889305.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (50398866493) and next prime (50398866517).

It can be written as a sum of positive squares in 12 ways, for example, as 21243645504 + 29155221001 = 145752^2 + 170749^2 .

It is not a de Polignac number, because 50398866505 - 2¹⁹ = 50398342217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2973555 + ... + 2990455.

It is an arithmetic number, because the mean of its divisors is an integer number (2729630745).

Almost surely, 2^50398866505 is an apocalyptic number.

It is an amenable number.

50398866505 is a deficient number, since it is larger than the sum of its proper divisors (15112271375).

50398866505 is a wasteful number, since it uses less digits than its factorization.

50398866505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20461 (or 20448 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 55.

The spelling of 50398866505 in words is "fifty billion, three hundred ninety-eight million, eight hundred sixty-six thousand, five hundred five".