405055017877 has 2 divisors, whose sum is σ = 405055017878. Its totient is φ = 405055017876.

The previous prime is 405055017841. The next prime is 405055017911. The reversal of 405055017877 is 778710550504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 273054322116 + 132000695761 = 522546^2 + 363319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405055017877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 405055017877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405055017277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202527508938 + 202527508939.

It is an arithmetic number, because the mean of its divisors is an integer number (202527508939).

Almost surely, 2^405055017877 is an apocalyptic number.

It is an amenable number.

405055017877 is a deficient number, since it is larger than the sum of its proper divisors (1).

405055017877 is an equidigital number, since it uses as much as digits as its factorization.

405055017877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1372000, while the sum is 49.

The spelling of 405055017877 in words is "four hundred five billion, fifty-five million, seventeen thousand, eight hundred seventy-seven".