7880758013 has 4 divisors (see below), whose sum is σ = 7900026780. Its totient is φ = 7861489248.

The previous prime is 7880757943. The next prime is 7880758021. The reversal of 7880758013 is 3108570887.

Added to its reverse (3108570887) it gives a square (10989328900 = 104830²).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3108570887 = 17 ⋅182857111.

It can be written as a sum of positive squares in 2 ways, for example, as 6913423609 + 967334404 = 83147^2 + 31102^2 .

It is a cyclic number.

It is not a de Polignac number, because 7880758013 - 2¹⁸ = 7880495869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7880758073) 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, 9633770 + ... + 9634587.

It is an arithmetic number, because the mean of its divisors is an integer number (1975006695).

Almost surely, 2^7880758013 is an apocalyptic number.

It is an amenable number.

7880758013 is a deficient number, since it is larger than the sum of its proper divisors (19268767).

7880758013 is a wasteful number, since it uses less digits than its factorization.

7880758013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19268766.

The product of its (nonzero) digits is 376320, while the sum is 47.

The square root of 7880758013 is about 88773.6335462281. The cubic root of 7880758013 is about 1990.0133845046.

Adding to 7880758013 its reverse (3108570887), we get a square (10989328900 = 104830²).

The spelling of 7880758013 in words is "seven billion, eight hundred eighty million, seven hundred fifty-eight thousand, thirteen".