401985320827 has 2 divisors, whose sum is σ = 401985320828. Its totient is φ = 401985320826.

The previous prime is 401985320777. The next prime is 401985320833. The reversal of 401985320827 is 728023589104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401985320827 - 2²³ = 401976932219 is a prime.

It is a super-2 number, since 2×401985320827² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401985320887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200992660413 + 200992660414.

It is an arithmetic number, because the mean of its divisors is an integer number (200992660414).

Almost surely, 2^401985320827 is an apocalyptic number.

401985320827 is a deficient number, since it is larger than the sum of its proper divisors (1).

401985320827 is an equidigital number, since it uses as much as digits as its factorization.

401985320827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 401985320827 in words is "four hundred one billion, nine hundred eighty-five million, three hundred twenty thousand, eight hundred twenty-seven".