1815609696 has 96 divisors (see below), whose sum is σ = 5011953408. Its totient is φ = 574379520.

The previous prime is 1815609659. The next prime is 1815609703. The reversal of 1815609696 is 6969065181.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286110 + ... + 292386.

It is an arithmetic number, because the mean of its divisors is an integer number (52207848).

Almost surely, 2^1815609696 is an apocalyptic number.

1815609696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1815609696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2505976704).

1815609696 is an abundant number, since it is smaller than the sum of its proper divisors (3196343712).

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

1815609696 is a wasteful number, since it uses less digits than its factorization.

1815609696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6444 (or 6436 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 51.

The square root of 1815609696 is about 42609.9717906501. The cubic root of 1815609696 is about 1219.9466284992.

The spelling of 1815609696 in words is "one billion, eight hundred fifteen million, six hundred nine thousand, six hundred ninety-six".