5240646561 has 4 divisors (see below), whose sum is σ = 6987528752. Its totient is φ = 3493764372.

The previous prime is 5240646517. The next prime is 5240646583. The reversal of 5240646561 is 1656460425.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5240646561 - 2¹⁴ = 5240630177 is a prime.

It is a super-2 number, since 2×5240646561² = 54928752754642253442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5240646361) 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, 873441091 + ... + 873441096.

It is an arithmetic number, because the mean of its divisors is an integer number (1746882188).

Almost surely, 2^5240646561 is an apocalyptic number.

It is an amenable number.

5240646561 is a deficient number, since it is larger than the sum of its proper divisors (1746882191).

5240646561 is a wasteful number, since it uses less digits than its factorization.

5240646561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746882190.

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 5240646561 is about 72392.3100957553. The cubic root of 5240646561 is about 1736.9805563902.

The spelling of 5240646561 in words is "five billion, two hundred forty million, six hundred forty-six thousand, five hundred sixty-one".