2620775638993 has 6 divisors (see below), whose sum is σ = 2765970965634. Its totient is φ = 2482840078704.

The previous prime is 2620775638991. The next prime is 2620775639059. The reversal of 2620775638993 is 3998365770262.

It can be written as a sum of positive squares in only one way, i.e., 2373670211584 + 247105427409 = 1540672^2 + 497097^2 .

It is not a de Polignac number, because 2620775638993 - 2¹ = 2620775638991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2620775638991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3629882796 + ... + 3629883517.

It is an arithmetic number, because the mean of its divisors is an integer number (460995160939).

Almost surely, 2^{2620775638993} is an apocalyptic number.

It is an amenable number.

2620775638993 is a deficient number, since it is larger than the sum of its proper divisors (145195326641).

2620775638993 is an equidigital number, since it uses as much as digits as its factorization.

2620775638993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7259766351 (or 7259766332 counting only the distinct ones).

The product of its (nonzero) digits is 205752960, while the sum is 67.

The spelling of 2620775638993 in words is "two trillion, six hundred twenty billion, seven hundred seventy-five million, six hundred thirty-eight thousand, nine hundred ninety-three".