1996521696 has 240 divisors, whose sum is σ = 6376852944. Its totient is φ = 609140736.

The previous prime is 1996521689. The next prime is 1996521697. The reversal of 1996521696 is 6961256991.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1996521697) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6503175 + ... + 6503481.

Almost surely, 2^1996521696 is an apocalyptic number.

1996521696 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 1996521696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3188426472).

1996521696 is an abundant number, since it is smaller than the sum of its proper divisors (4380331248).

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

1996521696 is a wasteful number, since it uses less digits than its factorization.

1996521696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 518 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 54.

The square root of 1996521696 is about 44682.4540060190. The cubic root of 1996521696 is about 1259.1902279896.

The spelling of 1996521696 in words is "one billion, nine hundred ninety-six million, five hundred twenty-one thousand, six hundred ninety-six".