6539790977 has 6 divisors (see below), whose sum is σ = 6703190214. Its totient is φ = 6380282240.

The previous prime is 6539790949. The next prime is 6539790989. The reversal of 6539790977 is 7790979356.

It can be written as a sum of positive squares in 3 ways, for example, as 171112561 + 6368678416 = 13081^2 + 79804^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6539790977 is a prime.

It is a super-2 number, since 2×6539790977² = 85537732045701229058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6539790947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1943528 + ... + 1946889.

It is an arithmetic number, because the mean of its divisors is an integer number (1117198369).

Almost surely, 2^6539790977 is an apocalyptic number.

It is an amenable number.

6539790977 is a deficient number, since it is larger than the sum of its proper divisors (163399237).

6539790977 is an equidigital number, since it uses as much as digits as its factorization.

6539790977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3890499 (or 3890458 counting only the distinct ones).

The product of its (nonzero) digits is 22504230, while the sum is 62.

The square root of 6539790977 is about 80868.9741309979. The cubic root of 6539790977 is about 1870.0560457718.

The spelling of 6539790977 in words is "six billion, five hundred thirty-nine million, seven hundred ninety thousand, nine hundred seventy-seven".