401155504391 has 2 divisors, whose sum is σ = 401155504392. Its totient is φ = 401155504390.

The previous prime is 401155504349. The next prime is 401155504487. The reversal of 401155504391 is 193405551104.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401155504391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401155507391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200577752195 + 200577752196.

It is an arithmetic number, because the mean of its divisors is an integer number (200577752196).

Almost surely, 2^401155504391 is an apocalyptic number.

401155504391 is a deficient number, since it is larger than the sum of its proper divisors (1).

401155504391 is an equidigital number, since it uses as much as digits as its factorization.

401155504391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 401155504391 in words is "four hundred one billion, one hundred fifty-five million, five hundred four thousand, three hundred ninety-one".