6554997520 has 20 divisors (see below), whose sum is σ = 15240369420. Its totient is φ = 2621998976.

The previous prime is 6554997509. The next prime is 6554997611. The reversal of 6554997520 is 257994556.

It can be written as a sum of positive squares in 2 ways, for example, as 5134009104 + 1420988416 = 71652^2 + 37696^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40968655 + ... + 40968814.

It is an arithmetic number, because the mean of its divisors is an integer number (762018471).

Almost surely, 2^6554997520 is an apocalyptic number.

It is an amenable number.

6554997520 is an abundant number, since it is smaller than the sum of its proper divisors (8685371900).

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

6554997520 is a wasteful number, since it uses less digits than its factorization.

6554997520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81937482 (or 81937476 counting only the distinct ones).

The product of its (nonzero) digits is 3402000, while the sum is 52.

The square root of 6554997520 is about 80962.9391758970. The cubic root of 6554997520 is about 1871.5043629653.

The spelling of 6554997520 in words is "six billion, five hundred fifty-four million, nine hundred ninety-seven thousand, five hundred twenty".