2790287537621 has 2 divisors, whose sum is σ = 2790287537622. Its totient is φ = 2790287537620.

The previous prime is 2790287537573. The next prime is 2790287537657. The reversal of 2790287537621 is 1267357820972.

2790287537621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2759715015121 + 30572522500 = 1661239^2 + 174850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2790287537621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2790287531621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1395143768810 + 1395143768811.

It is an arithmetic number, because the mean of its divisors is an integer number (1395143768811).

Almost surely, 2^{2790287537621} is an apocalyptic number.

It is an amenable number.

2790287537621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2790287537621 is an equidigital number, since it uses as much as digits as its factorization.

2790287537621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17781120, while the sum is 59.

The spelling of 2790287537621 in words is "two trillion, seven hundred ninety billion, two hundred eighty-seven million, five hundred thirty-seven thousand, six hundred twenty-one".