2520935978513 has 4 divisors (see below), whose sum is σ = 2520939172020. Its totient is φ = 2520932785008.

The previous prime is 2520935978497. The next prime is 2520935978521. The reversal of 2520935978513 is 3158795390252.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1143770358784 + 1377165619729 = 1069472^2 + 1173527^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520935978513 - 2⁴ = 2520935978497 is a prime.

It is a super-2 number, since 2×2520935978513² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2520935978213) 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, 544331 + ... + 2310447.

It is an arithmetic number, because the mean of its divisors is an integer number (630234793005).

Almost surely, 2^{2520935978513} is an apocalyptic number.

It is an amenable number.

2520935978513 is a deficient number, since it is larger than the sum of its proper divisors (3193507).

2520935978513 is a wasteful number, since it uses less digits than its factorization.

2520935978513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193506.

The product of its (nonzero) digits is 20412000, while the sum is 59.

The spelling of 2520935978513 in words is "two trillion, five hundred twenty billion, nine hundred thirty-five million, nine hundred seventy-eight thousand, five hundred thirteen".