2601621355 has 16 divisors (see below), whose sum is σ = 3159129600. Its totient is φ = 2056643680.

The previous prime is 2601621353. The next prime is 2601621371. The reversal of 2601621355 is 5531261062.

It is not a de Polignac number, because 2601621355 - 2¹ = 2601621353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2601621353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148236 + ... + 164854.

It is an arithmetic number, because the mean of its divisors is an integer number (197445600).

Almost surely, 2^2601621355 is an apocalyptic number.

2601621355 is a deficient number, since it is larger than the sum of its proper divisors (557508245).

2601621355 is a wasteful number, since it uses less digits than its factorization.

2601621355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16994.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2601621355 is about 51006.0913519160. The cubic root of 2601621355 is about 1375.3546377807.

The spelling of 2601621355 in words is "two billion, six hundred one million, six hundred twenty-one thousand, three hundred fifty-five".