641540038 has 16 divisors (see below), whose sum is σ = 992993904. Its totient is φ = 310656640.

The previous prime is 641540027. The next prime is 641540041. The reversal of 641540038 is 830045146.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 641539991 and 641540009.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17320 + ... + 39787.

It is an arithmetic number, because the mean of its divisors is an integer number (62062119).

Almost surely, 2^641540038 is an apocalyptic number.

641540038 is a deficient number, since it is larger than the sum of its proper divisors (351453866).

641540038 is a wasteful number, since it uses less digits than its factorization.

641540038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57287.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 641540038 is about 25328.6406662497. The cubic root of 641540038 is about 862.4645538328.

The spelling of 641540038 in words is "six hundred forty-one million, five hundred forty thousand, thirty-eight".