2621465380 has 24 divisors (see below), whose sum is σ = 5639349240. Its totient is φ = 1023010560.

The previous prime is 2621465351. The next prime is 2621465381. The reversal of 2621465380 is 835641262.

It can be written as a sum of positive squares in 4 ways, for example, as 214974244 + 2406491136 = 14662^2 + 49056^2 .

It is not an unprimeable number, because it can be changed into a prime (2621465381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1597635 + ... + 1599274.

It is an arithmetic number, because the mean of its divisors is an integer number (234972885).

Almost surely, 2^2621465380 is an apocalyptic number.

2621465380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2621465380 is an abundant number, since it is smaller than the sum of its proper divisors (3017883860).

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

2621465380 is a wasteful number, since it uses less digits than its factorization.

2621465380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196959 (or 3196957 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 2621465380 is about 51200.2478509626. The cubic root of 2621465380 is about 1378.8426514394.

The spelling of 2621465380 in words is "two billion, six hundred twenty-one million, four hundred sixty-five thousand, three hundred eighty".