7845113561 has 4 divisors (see below), whose sum is σ = 7851930624. Its totient is φ = 7838296500.

The previous prime is 7845113537. The next prime is 7845113567. The reversal of 7845113561 is 1653115487.

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 7845113561 - 2¹⁰ = 7845112537 is a prime.

It is a super-2 number, since 2×7845113561² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7845113567) 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, 3406805 + ... + 3409106.

It is an arithmetic number, because the mean of its divisors is an integer number (1962982656).

Almost surely, 2^7845113561 is an apocalyptic number.

It is an amenable number.

7845113561 is a deficient number, since it is larger than the sum of its proper divisors (6817063).

7845113561 is a wasteful number, since it uses less digits than its factorization.

7845113561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6817062.

The product of its digits is 100800, while the sum is 41.

The square root of 7845113561 is about 88572.6456700939. The cubic root of 7845113561 is about 1987.0085911182.

The spelling of 7845113561 in words is "seven billion, eight hundred forty-five million, one hundred thirteen thousand, five hundred sixty-one".