2072155639 has 2 divisors, whose sum is σ = 2072155640. Its totient is φ = 2072155638.

The previous prime is 2072155633. The next prime is 2072155643. The reversal of 2072155639 is 9365512702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2072155639 - 2⁵ = 2072155607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2072155633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1036077819 + 1036077820.

It is an arithmetic number, because the mean of its divisors is an integer number (1036077820).

Almost surely, 2^2072155639 is an apocalyptic number.

2072155639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2072155639 is an equidigital number, since it uses as much as digits as its factorization.

2072155639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 2072155639 is about 45520.9362711269. The cubic root of 2072155639 is about 1274.8941373594.

The spelling of 2072155639 in words is "two billion, seventy-two million, one hundred fifty-five thousand, six hundred thirty-nine".