1523663245 has 8 divisors (see below), whose sum is σ = 1969041816. Its totient is φ = 1125166656.

The previous prime is 1523663231. The next prime is 1523663291. The reversal of 1523663245 is 5423663251.

It can be written as a sum of positive squares in 4 ways, for example, as 556516 + 1523106729 = 746^2 + 39027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1523663245 - 2⁷ = 1523663117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11720422 + ... + 11720551.

It is an arithmetic number, because the mean of its divisors is an integer number (246130227).

Almost surely, 2^1523663245 is an apocalyptic number.

It is an amenable number.

1523663245 is a deficient number, since it is larger than the sum of its proper divisors (445378571).

1523663245 is a wasteful number, since it uses less digits than its factorization.

1523663245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23440991.

The product of its digits is 129600, while the sum is 37.

The square root of 1523663245 is about 39034.1292332748. The cubic root of 1523663245 is about 1150.7023422361.

The spelling of 1523663245 in words is "one billion, five hundred twenty-three million, six hundred sixty-three thousand, two hundred forty-five".