2155537696 has 24 divisors (see below), whose sum is σ = 4570155324. Its totient is φ = 994863360.

The previous prime is 2155537693. The next prime is 2155537721. The reversal of 2155537696 is 6967355512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1915287696 + 240250000 = 43764^2 + 15500^2 .

It is not an unprimeable number, because it can be changed into a prime (2155537691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2590375 + ... + 2591206.

Almost surely, 2^2155537696 is an apocalyptic number.

2155537696 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2155537696 is an abundant number, since it is smaller than the sum of its proper divisors (2414617628).

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

2155537696 is a wasteful number, since it uses less digits than its factorization.

2155537696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5181604 (or 5181596 counting only the distinct ones).

The product of its digits is 1701000, while the sum is 49.

The square root of 2155537696 is about 46427.7685873444. The cubic root of 2155537696 is about 1291.7700389795.

The spelling of 2155537696 in words is "two billion, one hundred fifty-five million, five hundred thirty-seven thousand, six hundred ninety-six".