1621076231611 has 2 divisors, whose sum is σ = 1621076231612. Its totient is φ = 1621076231610.

The previous prime is 1621076231573. The next prime is 1621076231617. The reversal of 1621076231611 is 1161326701261.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1621076231611 is a prime.

It is not a weakly prime, because it can be changed into another prime (1621076231617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810538115805 + 810538115806.

It is an arithmetic number, because the mean of its divisors is an integer number (810538115806).

Almost surely, 2^{1621076231611} is an apocalyptic number.

1621076231611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1621076231611 is an equidigital number, since it uses as much as digits as its factorization.

1621076231611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 1621076231611 in words is "one trillion, six hundred twenty-one billion, seventy-six million, two hundred thirty-one thousand, six hundred eleven".