1627641401 has 2 divisors, whose sum is σ = 1627641402. Its totient is φ = 1627641400.

The previous prime is 1627641397. The next prime is 1627641419. The reversal of 1627641401 is 1041467261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1465741225 + 161900176 = 38285^2 + 12724^2 .

It is a cyclic number.

It is not a de Polignac number, because 1627641401 - 2² = 1627641397 is a prime.

It is not a weakly prime, because it can be changed into another prime (1627641601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 813820700 + 813820701.

It is an arithmetic number, because the mean of its divisors is an integer number (813820701).

Almost surely, 2^1627641401 is an apocalyptic number.

It is an amenable number.

1627641401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1627641401 is an equidigital number, since it uses as much as digits as its factorization.

1627641401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1627641401 is about 40344.0379858040. The cubic root of 1627641401 is about 1176.3040059783.

The spelling of 1627641401 in words is "one billion, six hundred twenty-seven million, six hundred forty-one thousand, four hundred one".