7643251085 has 8 divisors (see below), whose sum is σ = 9711425016. Its totient is φ = 5754918400.

The previous prime is 7643251069. The next prime is 7643251123. The reversal of 7643251085 is 5801523467.

It can be written as a sum of positive squares in 4 ways, for example, as 4121896804 + 3521354281 = 64202^2 + 59341^2 .

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

It is not a de Polignac number, because 7643251085 - 2⁴ = 7643251069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 44960216 + ... + 44960385.

It is an arithmetic number, because the mean of its divisors is an integer number (1213928127).

Almost surely, 2^7643251085 is an apocalyptic number.

It is an amenable number.

7643251085 is a deficient number, since it is larger than the sum of its proper divisors (2068173931).

7643251085 is a wasteful number, since it uses less digits than its factorization.

7643251085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89920623.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 7643251085 is about 87425.6889306570. The cubic root of 7643251085 is about 1969.8177303085.

The spelling of 7643251085 in words is "seven billion, six hundred forty-three million, two hundred fifty-one thousand, eighty-five".