1877741966021 has 2 divisors, whose sum is σ = 1877741966022. Its totient is φ = 1877741966020.

The previous prime is 1877741965991. The next prime is 1877741966053. The reversal of 1877741966021 is 1206691477781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1743163043521 + 134578922500 = 1320289^2 + 366850^2 .

It is an emirp because it is prime and its reverse (1206691477781) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1877741966021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1877741969021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 938870983010 + 938870983011.

It is an arithmetic number, because the mean of its divisors is an integer number (938870983011).

Almost surely, 2^{1877741966021} is an apocalyptic number.

It is an amenable number.

1877741966021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1877741966021 is an equidigital number, since it uses as much as digits as its factorization.

1877741966021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7112448, while the sum is 59.

The spelling of 1877741966021 in words is "one trillion, eight hundred seventy-seven billion, seven hundred forty-one million, nine hundred sixty-six thousand, twenty-one".