7615309372225 has 9 divisors (see below), whose sum is σ = 9443000731017. Its totient is φ = 6092236459440.

The previous prime is 7615309372219. The next prime is 7615309372243. The reversal of 7615309372225 is 5222739035167.

The square root of 7615309372225 is 2759585.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 7553869569 + 7607755502656 = 86913^2 + 2758216^2 .

It is not a de Polignac number, because 7615309372225 - 2³ = 7615309372217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13521967 + ... + 14073883.

Almost surely, 2^{7615309372225} is an apocalyptic number.

7615309372225 is the 2759585-th square number.

7615309372225 is the 1379793-rd centered octagonal number.

It is an amenable number.

7615309372225 is a deficient number, since it is larger than the sum of its proper divisors (1827691358792).

7615309372225 is an frugal number, since it uses more digits than its factorization.

7615309372225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103844 (or 551922 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 52.

The spelling of 7615309372225 in words is "seven trillion, six hundred fifteen billion, three hundred nine million, three hundred seventy-two thousand, two hundred twenty-five".