650038394881 has 4 divisors (see below), whose sum is σ = 684250942000. Its totient is φ = 615825847764.

The previous prime is 650038394801. The next prime is 650038394903. The reversal of 650038394881 is 188493830056.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 650038394881 - 2³¹ = 647890911233 is a prime.

It is a super-2 number, since 2×650038394881² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650038394801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17106273531 + ... + 17106273568.

It is an arithmetic number, because the mean of its divisors is an integer number (171062735500).

Almost surely, 2^650038394881 is an apocalyptic number.

It is an amenable number.

650038394881 is a deficient number, since it is larger than the sum of its proper divisors (34212547119).

650038394881 is a wasteful number, since it uses less digits than its factorization.

650038394881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34212547118.

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 650038394881 in words is "six hundred fifty billion, thirty-eight million, three hundred ninety-four thousand, eight hundred eighty-one".