7275686640 has 40 divisors (see below), whose sum is σ = 22554629328. Its totient is φ = 1940183040.

The previous prime is 7275686629. The next prime is 7275686647. The reversal of 7275686640 is 466865727.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7275686647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15157441 + ... + 15157920.

Almost surely, 2^7275686640 is an apocalyptic number.

It is an amenable number.

7275686640 is an abundant number, since it is smaller than the sum of its proper divisors (15278942688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7275686640 is a wasteful number, since it uses less digits than its factorization.

7275686640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30315377 (or 30315371 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 51.

The square root of 7275686640 is about 85297.6356061526. The cubic root of 7275686640 is about 1937.7213690319.

The spelling of 7275686640 in words is "seven billion, two hundred seventy-five million, six hundred eighty-six thousand, six hundred forty".