7813206745 has 8 divisors (see below), whose sum is σ = 9414753480. Its totient is φ = 6224628480.

The previous prime is 7813206719. The next prime is 7813206761. The reversal of 7813206745 is 5476023187.

It can be written as a sum of positive squares in 4 ways, for example, as 2363223769 + 5449982976 = 48613^2 + 73824^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7813206745 - 2¹¹ = 7813204697 is a prime.

It is a super-2 number, since 2×7813206745² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3240790 + ... + 3243199.

It is an arithmetic number, because the mean of its divisors is an integer number (1176844185).

Almost surely, 2^7813206745 is an apocalyptic number.

It is an amenable number.

7813206745 is a deficient number, since it is larger than the sum of its proper divisors (1601546735).

7813206745 is a wasteful number, since it uses less digits than its factorization.

7813206745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6484235.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 7813206745 is about 88392.3455113620. The cubic root of 7813206745 is about 1984.3111471698.

The spelling of 7813206745 in words is "seven billion, eight hundred thirteen million, two hundred six thousand, seven hundred forty-five".