7816488013 has 4 divisors (see below), whose sum is σ = 7998266848. Its totient is φ = 7634709180.

The previous prime is 7816487989. The next prime is 7816488023. The reversal of 7816488013 is 3108846187.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7816488013 - 2⁵ = 7816487981 is a prime.

It is a super-2 number, since 2×7816488013² (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 (7816488023) 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, 90889353 + ... + 90889438.

It is an arithmetic number, because the mean of its divisors is an integer number (1999566712).

Almost surely, 2^7816488013 is an apocalyptic number.

It is an amenable number.

7816488013 is a deficient number, since it is larger than the sum of its proper divisors (181778835).

7816488013 is a wasteful number, since it uses less digits than its factorization.

7816488013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181778834.

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 7816488013 is about 88410.9043783627. The cubic root of 7816488013 is about 1984.5888882486.

The spelling of 7816488013 in words is "seven billion, eight hundred sixteen million, four hundred eighty-eight thousand, thirteen".