2520305864 has 8 divisors (see below), whose sum is σ = 4725573510. Its totient is φ = 1260152928.

The previous prime is 2520305861. The next prime is 2520305869. The reversal of 2520305864 is 4685030252.

It can be written as a sum of positive squares in only one way, i.e., 1835436964 + 684868900 = 42842^2 + 26170^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2520305864² = 12703883296225572992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2520305861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157519109 + ... + 157519124.

Almost surely, 2^2520305864 is an apocalyptic number.

It is an amenable number.

2520305864 is a deficient number, since it is larger than the sum of its proper divisors (2205267646).

2520305864 is a wasteful number, since it uses less digits than its factorization.

2520305864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315038239 (or 315038235 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 2520305864 is about 50202.6479779702. The cubic root of 2520305864 is about 1360.8734772287.

The spelling of 2520305864 in words is "two billion, five hundred twenty million, three hundred five thousand, eight hundred sixty-four".