7812918485 has 4 divisors (see below), whose sum is σ = 9375502188. Its totient is φ = 6250334784.

The previous prime is 7812918479. The next prime is 7812918493. The reversal of 7812918485 is 5848192187.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2224159921 + 5588758564 = 47161^2 + 74758^2 .

It is a cyclic number.

It is not a de Polignac number, because 7812918485 - 2⁸ = 7812918229 is a prime.

It is a super-2 number, since 2×7812918485² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781291844 + ... + 781291853.

It is an arithmetic number, because the mean of its divisors is an integer number (2343875547).

Almost surely, 2^7812918485 is an apocalyptic number.

It is an amenable number.

7812918485 is a deficient number, since it is larger than the sum of its proper divisors (1562583703).

7812918485 is a wasteful number, since it uses less digits than its factorization.

7812918485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562583702.

The product of its digits is 1290240, while the sum is 53.

The square root of 7812918485 is about 88390.7149252680. The cubic root of 7812918485 is about 1984.2867438492.

The spelling of 7812918485 in words is "seven billion, eight hundred twelve million, nine hundred eighteen thousand, four hundred eighty-five".