2520605557 has 8 divisors (see below), whose sum is σ = 2608266240. Its totient is φ = 2432994480.

The previous prime is 2520605497. The next prime is 2520605561. The reversal of 2520605557 is 7555060252.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2520605557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520608557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112428 + ... + 132970.

It is an arithmetic number, because the mean of its divisors is an integer number (326033280).

Almost surely, 2^2520605557 is an apocalyptic number.

It is an amenable number.

2520605557 is a deficient number, since it is larger than the sum of its proper divisors (87660683).

2520605557 is a wasteful number, since it uses less digits than its factorization.

2520605557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24803.

The product of its (nonzero) digits is 105000, while the sum is 37.

The square root of 2520605557 is about 50205.6327218371. The cubic root of 2520605557 is about 1360.9274161965.

The spelling of 2520605557 in words is "two billion, five hundred twenty million, six hundred five thousand, five hundred fifty-seven".