30206065085781 has 16 divisors (see below), whose sum is σ = 43660048575360. Its totient is φ = 18465246100800.

The previous prime is 30206065085773. The next prime is 30206065085783. The reversal of 30206065085781 is 18758056060203.

It is a happy number.

It is not a de Polignac number, because 30206065085781 - 2³ = 30206065085773 is a prime.

It is a super-2 number, since 2×30206065085781² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30206065085783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2564611626 + ... + 2564623403.

It is an arithmetic number, because the mean of its divisors is an integer number (2728753035960).

Almost surely, 2^{30206065085781} is an apocalyptic number.

It is an amenable number.

30206065085781 is a deficient number, since it is larger than the sum of its proper divisors (13453983489579).

30206065085781 is a wasteful number, since it uses less digits than its factorization.

30206065085781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5129235196.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 30206065085781 in words is "thirty trillion, two hundred six billion, sixty-five million, eighty-five thousand, seven hundred eighty-one".