2621276655 has 16 divisors (see below), whose sum is σ = 4307396064. Its totient is φ = 1360229760.

The previous prime is 2621276633. The next prime is 2621276663. The reversal of 2621276655 is 5566721262.

It is not a de Polignac number, because 2621276655 - 2⁹ = 2621276143 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2360956 + ... + 2362065.

It is an arithmetic number, because the mean of its divisors is an integer number (269212254).

Almost surely, 2^2621276655 is an apocalyptic number.

2621276655 is a deficient number, since it is larger than the sum of its proper divisors (1686119409).

2621276655 is a wasteful number, since it uses less digits than its factorization.

2621276655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723066.

The product of its digits is 302400, while the sum is 42.

The square root of 2621276655 is about 51198.4048091344. The cubic root of 2621276655 is about 1378.8095620172.

The spelling of 2621276655 in words is "two billion, six hundred twenty-one million, two hundred seventy-six thousand, six hundred fifty-five".