7087771645 has 16 divisors (see below), whose sum is σ = 8795847168. Its totient is φ = 5477209920.

The previous prime is 7087771643. The next prime is 7087771697. The reversal of 7087771645 is 5461777807.

It is a happy number.

It is not a de Polignac number, because 7087771645 - 2¹ = 7087771643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7087771592 and 7087771601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7087771643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42987 + ... + 126583.

It is an arithmetic number, because the mean of its divisors is an integer number (549740448).

Almost surely, 2^7087771645 is an apocalyptic number.

It is an amenable number.

7087771645 is a deficient number, since it is larger than the sum of its proper divisors (1708075523).

7087771645 is a wasteful number, since it uses less digits than its factorization.

7087771645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84180.

The product of its (nonzero) digits is 2304960, while the sum is 52.

The square root of 7087771645 is about 84188.9045242899. The cubic root of 7087771645 is about 1920.8932877622.

The spelling of 7087771645 in words is "seven billion, eighty-seven million, seven hundred seventy-one thousand, six hundred forty-five".