2621406997827 has 12 divisors (see below), whose sum is σ = 3788195585304. Its totient is φ = 1746811368000.

The previous prime is 2621406997801. The next prime is 2621406997849. The reversal of 2621406997827 is 7287996041262.

2621406997827 is a `hidden beast` number, since 2 + 62 + 1 + 406 + 9 + 97 + 82 + 7 = 666.

It is not a de Polignac number, because 2621406997827 - 2¹² = 2621406993731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2621406997127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66087174 + ... + 66126827.

It is an arithmetic number, because the mean of its divisors is an integer number (315682965442).

Almost surely, 2^{2621406997827} is an apocalyptic number.

2621406997827 is a deficient number, since it is larger than the sum of its proper divisors (1166788587477).

2621406997827 is a wasteful number, since it uses less digits than its factorization.

2621406997827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132216210 (or 132216207 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 2621406997827 in words is "two trillion, six hundred twenty-one billion, four hundred six million, nine hundred ninety-seven thousand, eight hundred twenty-seven".