2621132808 has 128 divisors (see below), whose sum is σ = 7962624000. Its totient is φ = 702763776.

The previous prime is 2621132797. The next prime is 2621132819. The reversal of 2621132808 is 8082311262.

It is a Cunningham number, because it is equal to 51197²-1.

It is an interprime number because it is at equal distance from previous prime (2621132797) and next prime (2621132819).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198393 + ... + 211191.

It is an arithmetic number, because the mean of its divisors is an integer number (62208000).

Almost surely, 2^2621132808 is an apocalyptic number.

2621132808 is a gapful number since it is divisible by the number (28) 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 2621132808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3981312000).

2621132808 is an abundant number, since it is smaller than the sum of its proper divisors (5341491192).

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

2621132808 is a wasteful number, since it uses less digits than its factorization.

2621132808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12891 (or 12887 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 2621132808 is about 51196.9999902338. Note that the first 5 decimals coincide. The cubic root of 2621132808 is about 1378.7843400518.

The spelling of 2621132808 in words is "two billion, six hundred twenty-one million, one hundred thirty-two thousand, eight hundred eight".