7870427613 has 28 divisors (see below), whose sum is σ = 11922002428. Its totient is φ = 5192812800.

The previous prime is 7870427581. The next prime is 7870427639. The reversal of 7870427613 is 3167240787.

7870427613 is a `hidden beast` number, since 7 + 8 + 7 + 0 + 4 + 27 + 613 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5609710404 + 2260717209 = 74898^2 + 47547^2 .

It is not a de Polignac number, because 7870427613 - 2⁵ = 7870427581 is a prime.

It is a super-2 number, since 2×7870427613² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7870427683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 15063 + ... + 126363.

It is an arithmetic number, because the mean of its divisors is an integer number (425785801).

Almost surely, 2^7870427613 is an apocalyptic number.

It is an amenable number.

7870427613 is a deficient number, since it is larger than the sum of its proper divisors (4051574815).

7870427613 is an equidigital number, since it uses as much as digits as its factorization.

7870427613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111416 (or 111401 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 7870427613 is about 88715.4305236693. The cubic root of 7870427613 is about 1989.1434756558.

The spelling of 7870427613 in words is "seven billion, eight hundred seventy million, four hundred twenty-seven thousand, six hundred thirteen".