7613591645 has 12 divisors (see below), whose sum is σ = 10042391100. Its totient is φ = 5537157120.

The previous prime is 7613591641. The next prime is 7613591651. The reversal of 7613591645 is 5461953167.

It can be written as a sum of positive squares in 2 ways, for example, as 5858065444 + 1755526201 = 76538^2 + 41899^2 .

It is not a de Polignac number, because 7613591645 - 2² = 7613591641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7613591645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7613591641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6291620 + ... + 6292829.

It is an arithmetic number, because the mean of its divisors is an integer number (836865925).

Almost surely, 2^7613591645 is an apocalyptic number.

It is an amenable number.

7613591645 is a deficient number, since it is larger than the sum of its proper divisors (2428799455).

7613591645 is a wasteful number, since it uses less digits than its factorization.

7613591645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12584476 (or 12584465 counting only the distinct ones).

The product of its digits is 680400, while the sum is 47.

The square root of 7613591645 is about 87255.8974797692. The cubic root of 7613591645 is about 1967.2664850327.

The spelling of 7613591645 in words is "seven billion, six hundred thirteen million, five hundred ninety-one thousand, six hundred forty-five".