7640267725 has 6 divisors (see below), whose sum is σ = 9473932010. Its totient is φ = 6112214160.

The previous prime is 7640267711. The next prime is 7640267729. The reversal of 7640267725 is 5277620467.

It can be written as a sum of positive squares in 3 ways, for example, as 78747876 + 7561519849 = 8874^2 + 86957^2 .

It is not a de Polignac number, because 7640267725 - 2⁵ = 7640267693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640267729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 152805330 + ... + 152805379.

Almost surely, 2^7640267725 is an apocalyptic number.

It is an amenable number.

7640267725 is a deficient number, since it is larger than the sum of its proper divisors (1833664285).

7640267725 is a wasteful number, since it uses less digits than its factorization.

7640267725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305610719 (or 305610714 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 46.

The square root of 7640267725 is about 87408.6250034858. The cubic root of 7640267725 is about 1969.5614065648.

The spelling of 7640267725 in words is "seven billion, six hundred forty million, two hundred sixty-seven thousand, seven hundred twenty-five".