404640061951 has 2 divisors, whose sum is σ = 404640061952. Its totient is φ = 404640061950.

The previous prime is 404640061949. The next prime is 404640062027. The reversal of 404640061951 is 159160046404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404640061951 - 2¹ = 404640061949 is a prime.

Together with 404640061949, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404640061901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202320030975 + 202320030976.

It is an arithmetic number, because the mean of its divisors is an integer number (202320030976).

Almost surely, 2^404640061951 is an apocalyptic number.

404640061951 is a deficient number, since it is larger than the sum of its proper divisors (1).

404640061951 is an equidigital number, since it uses as much as digits as its factorization.

404640061951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 404640061951 in words is "four hundred four billion, six hundred forty million, sixty-one thousand, nine hundred fifty-one".