2621161600 has 96 divisors (see below), whose sum is σ = 6684215040. Its totient is φ = 1014604800.

The previous prime is 2621161589. The next prime is 2621161649. The reversal of 2621161600 is 61611262.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85989 + ... + 112411.

It is an arithmetic number, because the mean of its divisors is an integer number (69627240).

Almost surely, 2^2621161600 is an apocalyptic number.

2621161600 is a gapful number since it is divisible by the number (20) 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 2621161600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3342107520).

2621161600 is an abundant number, since it is smaller than the sum of its proper divisors (4063053440).

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

2621161600 is a wasteful number, since it uses less digits than its factorization.

2621161600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26478 (or 26461 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2621161600 is about 51197.2811778126. The cubic root of 2621161600 is about 1378.7893884814.

Adding to 2621161600 its reverse (61611262), we get a palindrome (2682772862).

The spelling of 2621161600 in words is "two billion, six hundred twenty-one million, one hundred sixty-one thousand, six hundred".