7255438680 has 64 divisors (see below), whose sum is σ = 24875792640. Its totient is φ = 1658385792.

The previous prime is 7255438661. The next prime is 7255438681. The reversal of 7255438680 is 868345527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7255438681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4317874 + ... + 4319553.

It is an arithmetic number, because the mean of its divisors is an integer number (388684260).

Almost surely, 2^7255438680 is an apocalyptic number.

7255438680 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7255438680 is an abundant number, since it is smaller than the sum of its proper divisors (17620353960).

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

7255438680 is a wasteful number, since it uses less digits than its factorization.

7255438680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8637448 (or 8637444 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 48.

The square root of 7255438680 is about 85178.8628710198. The cubic root of 7255438680 is about 1935.9221639301.

The spelling of 7255438680 in words is "seven billion, two hundred fifty-five million, four hundred thirty-eight thousand, six hundred eighty".