641642105 has 32 divisors (see below), whose sum is σ = 842849280. Its totient is φ = 466099200.

The previous prime is 641642083. The next prime is 641642117. The reversal of 641642105 is 501246146.

It is not a de Polignac number, because 641642105 - 2¹² = 641638009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1599905 + ... + 1600305.

It is an arithmetic number, because the mean of its divisors is an integer number (26339040).

Almost surely, 2^641642105 is an apocalyptic number.

641642105 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

641642105 is a deficient number, since it is larger than the sum of its proper divisors (201207175).

641642105 is a wasteful number, since it uses less digits than its factorization.

641642105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 641642105 is about 25330.6554396052. The cubic root of 641642105 is about 862.5102898723.

The spelling of 641642105 in words is "six hundred forty-one million, six hundred forty-two thousand, one hundred five".