641875398 has 32 divisors (see below), whose sum is σ = 1382787072. Its totient is φ = 198052800.

The previous prime is 641875379. The next prime is 641875411. The reversal of 641875398 is 893578146.

It is a self number, because there is not a number n which added to its sum of digits gives 641875398.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70743 + ... + 79298.

It is an arithmetic number, because the mean of its divisors is an integer number (43212096).

Almost surely, 2^641875398 is an apocalyptic number.

641875398 is an abundant number, since it is smaller than the sum of its proper divisors (740911674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641875398 is a wasteful number, since it uses less digits than its factorization.

641875398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150100.

The product of its digits is 1451520, while the sum is 51.

The square root of 641875398 is about 25335.2599749835. The cubic root of 641875398 is about 862.6148098374.

The spelling of 641875398 in words is "six hundred forty-one million, eight hundred seventy-five thousand, three hundred ninety-eight".