6211720572 has 12 divisors (see below), whose sum is σ = 14494014696. Its totient is φ = 2070573520.

The previous prime is 6211720547. The next prime is 6211720577. The reversal of 6211720572 is 2750271126.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6211720577) 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, 258821679 + ... + 258821702.

It is an arithmetic number, because the mean of its divisors is an integer number (1207834558).

Almost surely, 2^6211720572 is an apocalyptic number.

It is an amenable number.

6211720572 is an abundant number, since it is smaller than the sum of its proper divisors (8282294124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6211720572 is a wasteful number, since it uses less digits than its factorization.

6211720572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517643388 (or 517643386 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 6211720572 is about 78814.4693060862. The cubic root of 6211720572 is about 1838.2474423966.

Adding to 6211720572 its reverse (2750271126), we get a palindrome (8961991698).

The spelling of 6211720572 in words is "six billion, two hundred eleven million, seven hundred twenty thousand, five hundred seventy-two".