7265572638 has 16 divisors (see below), whose sum is σ = 14535768720. Its totient is φ = 2421086976.

The previous prime is 7265572637. The next prime is 7265572651. The reversal of 7265572638 is 8362755627.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7265572637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172045 + ... + 210072.

It is an arithmetic number, because the mean of its divisors is an integer number (908485545).

Almost surely, 2^7265572638 is an apocalyptic number.

7265572638 is an abundant number, since it is smaller than the sum of its proper divisors (7270196082).

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

7265572638 is a wasteful number, since it uses less digits than its factorization.

7265572638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385291.

The product of its digits is 4233600, while the sum is 51.

The square root of 7265572638 is about 85238.3284561587. The cubic root of 7265572638 is about 1936.8230709528.

The spelling of 7265572638 in words is "seven billion, two hundred sixty-five million, five hundred seventy-two thousand, six hundred thirty-eight".