1815525448 has 16 divisors (see below), whose sum is σ = 3713574960. Its totient is φ = 825238800.

The previous prime is 1815525427. The next prime is 1815525457. The reversal of 1815525448 is 8445255181.

It is a super-2 number, since 2×1815525448² = 6592265304671201408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10315398 + ... + 10315573.

It is an arithmetic number, because the mean of its divisors is an integer number (232098435).

Almost surely, 2^1815525448 is an apocalyptic number.

It is an amenable number.

1815525448 is an abundant number, since it is smaller than the sum of its proper divisors (1898049512).

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

1815525448 is a wasteful number, since it uses less digits than its factorization.

1815525448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20630988 (or 20630984 counting only the distinct ones).

The product of its digits is 256000, while the sum is 43.

The square root of 1815525448 is about 42608.9831843005. The cubic root of 1815525448 is about 1219.9277588685.

The spelling of 1815525448 in words is "one billion, eight hundred fifteen million, five hundred twenty-five thousand, four hundred forty-eight".