401848521091 has 2 divisors, whose sum is σ = 401848521092. Its totient is φ = 401848521090.

The previous prime is 401848521079. The next prime is 401848521121. The reversal of 401848521091 is 190125848104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401848521091 - 2¹⁵ = 401848488323 is a prime.

It is a super-2 number, since 2×401848521091² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401848521391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200924260545 + 200924260546.

It is an arithmetic number, because the mean of its divisors is an integer number (200924260546).

Almost surely, 2^401848521091 is an apocalyptic number.

401848521091 is a deficient number, since it is larger than the sum of its proper divisors (1).

401848521091 is an equidigital number, since it uses as much as digits as its factorization.

401848521091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 43.

The spelling of 401848521091 in words is "four hundred one billion, eight hundred forty-eight million, five hundred twenty-one thousand, ninety-one".