213730065777 has 8 divisors (see below), whose sum is σ = 284983008064. Its totient is φ = 142481917008.

The previous prime is 213730065721. The next prime is 213730065797. The reversal of 213730065777 is 777560037312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213730065777 - 2¹⁸ = 213729803633 is a prime.

It is a super-2 number, since 2×213730065777² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213730065797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093018 + ... + 1273635.

It is an arithmetic number, because the mean of its divisors is an integer number (35622876008).

Almost surely, 2^213730065777 is an apocalyptic number.

It is an amenable number.

213730065777 is a deficient number, since it is larger than the sum of its proper divisors (71252942287).

213730065777 is a wasteful number, since it uses less digits than its factorization.

213730065777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396759.

The product of its (nonzero) digits is 1296540, while the sum is 48.

The spelling of 213730065777 in words is "two hundred thirteen billion, seven hundred thirty million, sixty-five thousand, seven hundred seventy-seven".